CN107790683B - The method for preparing stratiform aluminum matrix composite - Google Patents
The method for preparing stratiform aluminum matrix composite Download PDFInfo
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- CN107790683B CN107790683B CN201711066444.5A CN201711066444A CN107790683B CN 107790683 B CN107790683 B CN 107790683B CN 201711066444 A CN201711066444 A CN 201711066444A CN 107790683 B CN107790683 B CN 107790683B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
- B28B17/026—Conditioning ceramic materials
Abstract
A kind of method that doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum matrix composite.A kind of preparation method of laminar composite.The present invention be solves the problems, such as in existing stratiform aluminum matrix composite preparation process that method for controlling thickness is complicated, thickness control is inaccurate, complex process is at high cost, interfacial combined function is weak and composite material preparation process in precast body easily collapse.One, weighing；Two, prepared by SiC slurry；Three, SiC powder raw cook tape casting；Four, aluminum metallic foil is placed between SiC powder raw cook, cold pressing treatment obtains stratiform precast body；Five, degreasing processing and mold preheating；Six, liquid aluminium infiltrates；Laminar composite prepared by the present invention, method for controlling thickness is simple, and thickness is accurate, simple process, and raw material cost is low；Therefore composite technology is at low cost；The integrality of composite laminate constructions is can guarantee, interface cohesion is excellent；The present invention is suitable for the preparation of stratiform aluminum matrix composite.
Description
Technical field
The present invention relates to a kind of preparation methods of laminar composite.
Background technique
Non-homogeneous composite material is due to being expected to break through existing with higher resistant to damage tolerance ability and good tough matching
The performance boundary of metal-base composites, therefore extensive research has been obtained in recent years, wherein to imitate the laminated metal of clam shell feature
Based composites are studied the most deep.
The method of preparation layer structure metal-base composites mainly has powder laying method and rolling etc. at present.Powder paving
Layer method first, in accordance with the proportion of setting, ceramic powders are mixed with metal powder, then according still further to composition proportion be laid with
And sintering.The price of aluminium powder is 10 times or more of aluminium alloy block price, therefore the composite material cost of raw material is high；Simultaneously because
Diameier is usually at 10 μm, therefore when carrying out laying using the composite powder of aluminium alloy and ceramic particle, it is difficult to lay out thickness
The composite layer less than 100 μm is spent, composite laminate constructions adjustable range is narrow；In addition powder laying method is mainly closed in aluminium
The sintering preparation of composite material, therefore not formed effective atom key between ceramic particle and aluminum substrate are carried out below golden fusing point
It closes, binding mechanism is mainly mechanical bond, and interfacial combined function is weaker, so there are the costs of raw material using powder laying method
High, the problems such as thickness modification scope is narrow, interfacial combined function is weak.Rolling is to be superimposed composite layer with metal material layer
Afterwards, then by the way of rolling deformation thick-layer is become into thin layer.Since composite layer intensity is higher, plasticity is poor, this
Composite layer original thickness is usually 1mm or more in kind method, and by repeatedly accumulating rolling, can obtain minimum thickness is about
20 μm of composite layer.Therefore rolling can adjust the thickness of composite laminate constructions in a wider range；Lead to simultaneously
Excessive deformation processing can effectively improve the Interface adhesive strength of ceramic phase and aluminum metal substrate in composite material, interface knot
It is high to close intensity.But since composite layer deformability is poor, single deformation volume under pressure is usually less than 50%, therefore to obtain
Relatively thin composite layer requires heat to 400 DEG C~500 DEG C and handles by 5~10 accumulation rolling deformations, therefore composite wood
Expect that complex process, process costs are high；Marginal portion is easy to crack during the rolling process simultaneously, therefore the quality finally obtained is preferable
The weight of laminar composite plate be about the 40%~60% of original weight, be lost during composite technology larger.Stream
Prolong method of forming laminate precast body easily to collapse in infiltration process in ambient pressure before metal-base composites molding, thus broken
Bad layer structure feature；Therefore, the complicated, thickness for preparing in the preparation process of laminar composite that there are method for controlling thickness at present
Control inaccuracy, complex process is at high cost, laminar composite interfacial combined function is weak and composite material preparation process in it is pre-
The problem of body processed easily collapses, is unfavorable for industrial production.
Summary of the invention
The present invention be solve method for controlling thickness in existing stratiform aluminum matrix composite preparation process is complicated, thickness control not
Accurately, laminar composite interfacial combined function is weak and composite material preparation process in precast body the problem of easily collapsing, propose
A kind of method that doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum matrix composite.
Doctor-blade casting process, stacked-foil method and pressure infiltration method of the present invention combine the method for preparation stratiform aluminum matrix composite specific
It sequentially includes the following steps:
One, weighing:
Weigh 5~35 parts of SiC powder, 20~50 parts of solvent, 0.01~0.5 part of dispersion respectively by mass fraction
Agent, 5~20 parts of plasticizer, 4.5~69.9 parts of binder and 65~95 parts of aluminum metal are as raw material；
The purity of the SiC powder is greater than 97%, and average grain diameter is 0.3~50 μm；
The SiC powder is any combination of one or more of 3C, 2H, 4H, 6H；
The solvent is dehydrated alcohol and n-butanol (0.5~1) in mass ratio: 1 mixture；Dehydrated alcohol purity >
97%, n-butanol purity >=99.5%；
The dispersing agent is fish oil；Specially liquid catfish fish oil, purity > 99%；
The plasticizer is tributyl phosphate, purity >=99%；
The binder is polyvinyl butyral resin powder, and granularity is 20~200 mesh；
The aluminum metal is fine aluminium or aluminium alloy block；
The aluminium alloy be Al-Si alloy, made of Al-Cu alloy, Al-Mg alloy, Al-Si-Cu alloy, Al-Si-Mg alloy,
Al-Cu-Mg alloy, Al-Zn-Cu alloy, Al-Zn-Mg-Cu alloy, Al-Be alloy, Al-Li alloy, Al-Si-Cu-Mg alloy
One or more of mixture；The mass fraction of Si is 0.5%~25% in the Al-Si alloy；The made of Al-Cu alloy
The mass fraction of middle Cu is 0.5%~53%；The mass fraction of Mg is 0.5%~38% in the Al-Mg alloy；Al-Si-Cu
The mass fraction that the mass fraction of Si is 0.5%~25%, Cu in alloy is 0.5%~53%；Si in Al-Si-Mg alloy
The mass fraction that mass fraction is 0.5%~25%, Mg is 0.5%~38%；The mass fraction of Cu is in Al-Cu-Mg alloy
The mass fraction of 0.5%~53%, Mg are 0.5%~38%；In Al-Zn-Cu alloy the mass fraction of Zn be 0.5%~
The mass fraction of 55%, Cu are 0.5%~53%；The mass fraction of Zn is 0.5%~55%, Mg in Al-Zn-Mg-Cu alloy
Mass fraction be 0.5%~38%, Cu mass fraction be 0.5%~53%；The mass fraction of Be is in Al-Be alloy
0.5%~20%；The mass fraction of Li is 0.5%~35% in Al-Li alloy；The mass fraction of Al-Si-Cu-Mg alloy Si
The mass fraction that mass fraction for 0.5%~25%, Cu is 0.5%~53%, Mg is 0.5%~38%；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound is carried out to mixed slurry
Dispersion, the mixed slurry after then dispersing ultrasonic wave are placed in ball mill, and it is 5mm~30mm's that diameter is added into ball mill
Alumina balls simultaneously carry out ball milling for the first time, and the weighed plasticizer of step 1 and binder are then added into ball mill and carries out secondary
Ball milling obtains SiC slurry；
Ultrasonic power when the progress ultrasonic disperse is 200~400W, and the ultrasonic disperse time is 1~10min；
It is described progress for the first time ball milling when rotational speed of ball-mill be 10~500r/min, Ball-milling Time be 2~48h；Carry out secondary ball
Rotational speed of ball-mill is 10~500r/min when mill, and Ball-milling Time is 24~96h；
Wherein, the purpose of ultrasonic disperse is to keep SiC powder evenly dispersed in the slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained is placed in 1~5min of standing in environment under low pressure, then carries out tape casting and is given birth to
Base；Green compact are air-dried to 3 at room temperature~for 24 hours, obtain the stratiform SiC powder raw cook with a thickness of 0.1~2.5mm；
Base band uses polypropylene material during the tape casting, and 0.2~3mm, the traveling of base band is arranged in scraper height
Speed is 0.1~10mm/s；
The air pressure of the environment under low pressure be lower than standard atmospheric pressure, specially 1 × 10-1~1 × 105Pa；
Wherein, green compact are air-dried to 3 at room temperature~purpose for 24 hours is to remove the Flux Volatilization in green compact；By SiC
Slurry be placed in environment under low pressure stand 1~5min the purpose of be carry out degassing processing, with remove in mechanical milling process introduce slurry gas
Bubble；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 1~5 layer of aluminum metal is placed between adjacent SiC powder raw cook
Foil obtains stacking block, and stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；Single layer aluminum metallic foil with a thickness of 20 μm
~50 μm；
The technique of the cold pressing treatment are as follows: 0.02~0.4MPa and pressure maintaining are forced into the pressing speed of 0.1~3mm/min
10~60min；
Wherein, (SiCp/Al)-Al is realized in the number of plies for changing the aluminum metallic foil placed between adjacent SiC powder raw cook
The thickness of aluminum metal layer is accurately adjusted in laminar composite；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, it is under protective atmosphere, stratiform is pre-
Body processed is heated to 470 DEG C~Tm and keeps the temperature 2~10h, the stratiform precast body preheated；Simultaneously under protective atmosphere, by step
One weighed aluminum metal is heated to 250~350 DEG C of fusing point or more, the aluminum metal melted；
The protective atmosphere is nitrogen, argon gas or helium；The Tm is the fusing point of aluminum metallic foil；
Stratiform precast body is wherein heated to 470 DEG C~Tm and the purpose for keeping the temperature 2~10h makes in SiC powder raw cook
The organic matter such as decomposition such as fish oil, binder and plasticizer are volatilized；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained
Melting aluminum metal cast in preheating stratiform precast body upper surface, then carry out Pressure Infiltration processing, when the aluminium of melting
It is cooling with the speed of 20~40 DEG C/min after metal is infiltrated up to completely in the stratiform precast body of preheating, it finally demoulds, obtains
(SiCp/Al)-Al laminar composite ingot casting, that is, complete；
The pressure applied when Pressure Infiltration processing is 50~100MPa, and the speed of infiltration is 1~5mm/s.
Beneficial effects of the present invention:
1, the structure of (SiCp/Al)-Al laminar composite prepared by the present invention is SiCp/Al composite layer and aluminium gold
Belong to the alternate laminar composite of layer, wherein the thickness of SiCp/Al composite layer can be by adjusting tape casting raw cook
Thickness and number of plies realization are accurately adjusted in 0.1~2.5mm range；Meanwhile the present invention uses aluminum metallic foil as SiC powder raw cook
Separate layer, aluminum metallic foil thickness in monolayer can adjust in 20 μm~50 μ ms, therefore it is real to pass through different laminations
The thickness for now accurately adjusting aluminum metal layer in (SiCp/Al)-Al laminar composite is accurately adjusted in 20~200 μ ms；It is thick
Spend that the simple thickness of control method is accurate, simple process；
2, the present invention provides a kind of methods that low cost prepares (SiCp/Al)-Al laminar composite, with powder laying
Method is compared, and does not need using the aluminium powder of high price to be raw material, raw material cost is low；Compared with rolling, without passing through complexity
Multiple deformation, therefore composite technology is at low cost；
3, during doctor-blade casting process degreasing, not formed preferable combination between SiC powder, therefore treated for degreasing
Stratiform SiC powder precast body easily collapses in infiltration process in ambient pressure, to destroy layer structure feature；The present invention uses
The method of SiC powder raw cook and aluminum metallic foil lamination prepares stratiform precast body, during degreasing, even if stratiform SiC powder is raw
Piece collapses in ambient pressure and infiltration process, since the aluminum metallic foil that the present invention is arranged is separated by SiC powder raw cook,
SiC powder raw cook still can guarantee the integrality of composite laminate constructions in the case where collapsing；
4, the interface cohesion in powder laying method and rolling is mainly mechanical bond, and interfacial combined function is weaker, and this
Invention realizes the thickness of regulation SiC powder raw cook, while liquid aluminium being soaked by controlling scraper height during tape casting
It is seeped between the lamella of SiC powder raw cook and inside SiC powder raw cook, because the present invention is at high temperature under high pressure by liquid aluminium
Metal is filled between the lamella of stratiform SiC powder raw cook and inside SiC powder raw cook, therefore the combination of SiC and aluminum metal
For metallurgical bonding, obtained (SiCp/Al)-Al laminar composite interface cohesion is excellent；Solve ceramic material and metal not
The problem of wetting, reduces compound difficulty, and present invention process specifications compared with powder laying method and rolling are low, raw
It is simple to produce equipment, high production efficiency；
5, in (SiCp/Al)-Al laminar composite prepared by the present invention, SiC particulate content is 5~35%；Stratiform is multiple
The density of condensation material is 2.68~2.86g/cm3, elasticity modulus is 85~130GPa, and bending strength is 350~950MPa, surrender
Intensity is 150~500MPa, and tensile strength is 200~720MPa, and elongation percentage is 7~27%；
Detailed description of the invention:
Fig. 1 is the microstructure picture of (SiCp/Al)-Al laminar composite prepared by embodiment 1；Wherein 1 is SiCp/
Al composite layer, 2 be Al layers.
Specific embodiment:
The technical solution of the present invention is not limited to the following list, further includes between each specific embodiment
Any reasonable combination.
Specific embodiment 1: present embodiment doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation aluminum laminate
The method of based composites sequentially includes the following steps:
One, weighing:
Weigh 5~35 parts of SiC powder, 20~50 parts of solvent, 0.01~0.5 part of dispersion respectively by mass fraction
Agent, 5~20 parts of plasticizer, 4.5~69.9 parts of binder and 65~95 parts of aluminum metal are as raw material；
The solvent is dehydrated alcohol and n-butanol (0.5~1) in mass ratio: 1 mixture；
The dispersing agent is fish oil；
The plasticizer is tributyl phosphate；
The binder is polyvinyl butyral resin powder；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound is carried out to mixed slurry
Dispersion, the mixed slurry after then dispersing ultrasonic wave are placed in ball mill, and it is 5mm~30mm's that diameter is added into ball mill
Alumina balls simultaneously carry out ball milling for the first time, and the weighed plasticizer of step 1 and binder are then added into ball mill and carries out secondary
Ball milling obtains SiC slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained is placed in 1~5min of standing in environment under low pressure, then carries out tape casting and is given birth to
Base；Green compact are air-dried to 3 at room temperature~for 24 hours, obtain the stratiform SiC powder raw cook with a thickness of 0.1~2.5mm；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 1~5 layer of aluminum metal is placed between adjacent SiC powder raw cook
Foil obtains stacking block, and stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；The single layer aluminum metallic foil with a thickness of
20 μm~50 μm；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, it is under protective atmosphere, stratiform is pre-
Body processed is heated to 470 DEG C~Tm and keeps the temperature 2~10h, the stratiform precast body preheated；Simultaneously under protective atmosphere, by step
One weighed aluminum metal is heated to 250~350 DEG C of fusing point or more, the aluminum metal melted；The Tm is the molten of aluminum metallic foil
Point；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained
Melting aluminum metal cast in preheating stratiform precast body upper surface, then carry out Pressure Infiltration processing, when the aluminium of melting
It is cooling with the speed of 20~40 DEG C/min after metal is infiltrated up to completely in the stratiform precast body of preheating, it finally demoulds, obtains
(SiCp/Al)-Al laminar composite ingot casting, that is, complete.
Present embodiment have it is following the utility model has the advantages that
1, present embodiment preparation (SiCp/Al)-Al laminar composite structure be SiCp/Al composite layer with
The alternate laminar composite of aluminum metal layer, wherein the thickness of SiCp/Al composite layer can be raw by adjusting tape casting
Thickness and the number of plies realization of piece are accurately adjusted in 0.1~2.5mm range；Meanwhile present embodiment uses aluminum metallic foil as SiC
The separate layer of powder raw cook, aluminum metallic foil thickness in monolayer can be adjusted in 20 μm~50 μ ms, therefore can pass through difference
Lamination realize that the accurate thickness for adjusting aluminum metal layer in (SiCp/Al)-Al laminar composite is accurate in 20~200 μ ms
It adjusts；The simple thickness of method for controlling thickness is accurate, simple process；
2, present embodiments provide for a kind of methods that low cost prepares (SiCp/Al)-Al laminar composite, with powder
Laying method is compared, and does not need using the aluminium powder of high price to be raw material, raw material cost is low；Compared with rolling, without passing through
Complicated multiple deformation, therefore composite technology is at low cost；
3, during doctor-blade casting process degreasing, not formed preferable combination between SiC powder, therefore treated for degreasing
Stratiform SiC powder precast body easily collapses in infiltration process in ambient pressure, to destroy layer structure feature；Present embodiment
Stratiform precast body is prepared using the method for SiC powder raw cook and aluminum metallic foil lamination, during degreasing, even if stratiform SiC powder
Ultimogeniture piece collapses in ambient pressure and infiltration process, since the aluminum metallic foil of present embodiment setting is separated by SiC powder
Raw cook still can guarantee the integrality of composite laminate constructions in the case where SiC powder raw cook collapses；
4, the interface cohesion in powder laying method and rolling is mainly mechanical bond, and interfacial combined function is weaker, and this
Embodiment realizes the thickness of regulation SiC powder raw cook, while by liquid by controlling scraper height during tape casting
Aluminium is infiltrated up between the lamella of SiC powder raw cook and inside SiC powder raw cook, because present embodiment is at high temperature under high pressure
Liquid aluminum metal is filled between the lamella of stratiform SiC powder raw cook and inside SiC powder raw cook, therefore SiC and aluminium gold
What is belonged to is combined into metallurgical bonding, and obtained (SiCp/Al)-Al laminar composite interface cohesion is excellent；Solves ceramic material
With the non-wetted problem of metal, compound difficulty, and present embodiment technique compared with powder laying method and rolling are reduced
Technical requirements are low, and production equipment is simple, high production efficiency；
5, in (SiCp/Al)-Al laminar composite of present embodiment preparation, SiC particulate content is 5~35%；Layer
The density of shape composite material is 2.68~2.86g/cm3, elasticity modulus is 85~130GPa, and bending strength is 350~950MPa,
Yield strength is 150~500MPa, and tensile strength is 200~720MPa, and elongation percentage is 7~27%.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: SiC powder described in step 1 is
Any combination of one or more of 3C, 2H, 4H, 6H；The average grain diameter of SiC powder is 0.3~50 μm.Other steps and
Parameter is same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that: aluminium gold described in step 1
Belong to is fine aluminium or aluminium alloy block.Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment 4: present embodiment is unlike specific embodiment three: the aluminium alloy is Al-Si conjunction
Gold, made of Al-Cu alloy, Al-Mg alloy, Al-Si-Cu alloy, Al-Si-Mg alloy, Al-Cu-Mg alloy, Al-Zn-Cu alloy,
The mixture of one or more of Al-Zn-Mg-Cu alloy, Al-Be alloy, Al-Li alloy, Al-Si-Cu-Mg alloy；Institute
The mass fraction for stating Si in Al-Si alloy is 0.5%~25%；In the made of Al-Cu alloy mass fraction of Cu be 0.5%~
53%；The mass fraction of Mg is 0.5%~38% in the Al-Mg alloy；The mass fraction of Si is in Al-Si-Cu alloy
The mass fraction of 0.5%~25%, Cu are 0.5%~53%；In Al-Si-Mg alloy the mass fraction of Si be 0.5%~
The mass fraction of 25%, Mg are 0.5%~38%；The mass fraction of Cu is the matter of 0.5%~53%, Mg in Al-Cu-Mg alloy
Measuring score is 0.5%~38%；The mass fraction of Zn is that the mass fraction of 0.5%~55%, Cu is in Al-Zn-Cu alloy
0.5%~53%；The mass fraction that the mass fraction of Zn is 0.5%~55%, Mg in Al-Zn-Mg-Cu alloy is 0.5%~
The mass fraction of 38%, Cu are 0.5%~53%；The mass fraction of Be is 0.5%~20% in Al-Be alloy；Al-Li alloy
The mass fraction of middle Li is 0.5%~35%；The mass fraction of Al-Si-Cu-Mg alloy Si is the quality of 0.5%~25%, Cu
The mass fraction that score is 0.5%~53%, Mg is 0.5%~38%.Other steps and parameter and specific embodiment three-phase
Together.
Specific embodiment 5: present embodiment is unlike specific embodiment four: carrying out ultrasound described in step 2
Ultrasonic power when dispersion is 200~400W, and the ultrasonic disperse time is 1~10min.Other steps and parameter and specific implementation
Mode four is identical.
Specific embodiment 6: unlike one of present embodiment and specific embodiment one to five: described in step 2
Carrying out rotational speed of ball-mill when ball milling for the first time is 10~500r/min, and Ball-milling Time is 2~48h；Carry out rotational speed of ball-mill when secondary ball milling
For 10~500r/min, Ball-milling Time is 24~96h.Other steps and parameter are identical as one of specific embodiment one to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment one to six: described in step 3
Base band uses polypropylene material during tape casting, and scraper height is arranged 0.2~3mm, and the travel speed of base band is 0.1~
10mm/s.Other steps and parameter are identical as one of specific embodiment one to six.
Specific embodiment 8: unlike one of present embodiment and specific embodiment one to seven: described in step 3
The air pressure of environment under low pressure be lower than standard atmospheric pressure, specially 1 × 10-1~1 × 105Pa.Other steps and parameter and specific implementation
One of mode one to seven is identical.
Specific embodiment 9: unlike one of present embodiment and specific embodiment one to eight: described in step 4
The technique of cold pressing treatment are as follows: 0.02~0.4MPa and 10~60min of pressure maintaining are forced into the pressing speed of 0.1~3mm/min.Its
His step and parameter are identical as one of specific embodiment one to eight.
Specific embodiment 10: unlike one of present embodiment and specific embodiment one to nine: described in step 6
The pressure applied when Pressure Infiltration processing is 50~100MPa, and the speed of infiltration is 1~5mm/s.Other steps and parameter and tool
One of body embodiment one to nine is identical.
Specific embodiment 11: unlike one of present embodiment and specific embodiment one to ten: described anhydrous
Purity of alcohol > 97%, n-butanol purity >=99.5%.Other steps and parameter are identical as one of specific embodiment one to ten.
Specific embodiment 12: present embodiment is unlike specific embodiment one to one of 11: the fish
Oil is specially liquid catfish fish oil, purity > 99%.Other steps and parameter are identical as specific embodiment one to one of 11.
Specific embodiment 13: present embodiment is unlike specific embodiment one to one of 12: the SiC
The purity of powder is greater than 97%.Other steps and parameter are identical as specific embodiment one to one of 12.
Specific embodiment 14: present embodiment is unlike specific embodiment one to one of 13: the phosphorus
Purity >=99% of sour tributyl.Other steps and parameter are identical as specific embodiment one to one of 13.
Specific embodiment 15: present embodiment is unlike specific embodiment one to one of 14: described poly-
The granularity of vinyl butyral toner is 20~200 mesh.Other steps and parameter and specific embodiment one to 14 it
One is identical.
Specific embodiment 16: present embodiment is unlike specific embodiment one to one of 15: the guarantor
Shield atmosphere is nitrogen, argon gas or helium.Other steps and parameter are identical as specific embodiment one to one of 14.
Beneficial effects of the present invention are verified using following embodiment:
Embodiment 1:
A kind of method that doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum matrix composite, it is special
Sign is:
One, weighing:
Weigh 25 parts of SiC powder, 30 parts of solvent, 0.3 part of dispersing agent, 10 parts of plasticising respectively by mass fraction
Agent, 34.7 parts of binder and 75 parts of aluminum metal are as raw material；
The purity of the SiC powder is greater than 97%, and average grain diameter is 10 μm；
The SiC powder is 3C-SiC powder；
The solvent is dehydrated alcohol and the n-butanol mixture of 0.5:1 in mass ratio；Dehydrated alcohol purity > 97%, just
Butanol purity >=99.5%；
The dispersing agent is liquid catfish fish oil, purity > 99%；
The plasticizer is tributyl phosphate, purity >=99%；
The binder is polyvinyl butyral resin powder, and granularity is 100 mesh；
The aluminum metal is Al-Si-Mg alloy；The mass fraction that wherein mass fraction of Si is 10%, Mg is 10%；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound is carried out to mixed slurry
Dispersion, the mixed slurry after then dispersing ultrasonic wave are placed in ball mill, and the aluminium oxide that diameter is 5mm is added into ball mill
Ball simultaneously carries out ball milling for the first time, and the weighed plasticizer of step 1 and binder are then added into ball mill and carries out secondary ball milling,
Obtain SiC slurry；
Ultrasonic power when the progress ultrasonic disperse is 200W, and the ultrasonic disperse time is 10min；
It is described progress for the first time ball milling when rotational speed of ball-mill be 10r/min, Ball-milling Time 48h；Carry out ball milling when secondary ball milling
Revolving speed is 10r/min, Ball-milling Time 96h；
Wherein, the purpose of ultrasonic disperse is to keep SiC powder evenly dispersed in the slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained, which is placed in environment under low pressure, stands 1min, then carries out tape casting and obtains green compact；
Green compact are air-dried to the stratiform SiC powder raw cook obtained for 24 hours with a thickness of 1mm at room temperature；
Base band uses polypropylene material during the tape casting, and 2mm is arranged in scraper height, and the travel speed of base band is
10mm/s；
The air pressure of the environment under low pressure be lower than standard atmospheric pressure, specially 1 × 103Pa；
Wherein, it is to remove the Flux Volatilization in green compact that green compact are air-dried to purpose for 24 hours at room temperature；SiC is starched
Expecting to be placed in environment under low pressure the purpose of standing 1min is to carry out degassing processing, to remove the bubble for introducing slurry in mechanical milling process；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 5 layers of aluminum metallic foil are placed between adjacent SiC powder raw cook
Stacking block is obtained, stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；Single layer aluminum metallic foil with a thickness of 20 μ
m；
The technique of the cold pressing treatment are as follows: 0.1MPa and pressure maintaining 60min are forced into the pressing speed of 0.1mm/min；
Wherein, (SiCp/Al)-Al is realized in the number of plies for changing the aluminum metallic foil placed between adjacent SiC powder raw cook
The thickness of aluminum metal layer is accurately adjusted in laminar composite；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, it is under protective atmosphere, stratiform is pre-
Body processed is heated to 570 DEG C and keeps the temperature 5h, the stratiform precast body preheated；It is simultaneously under protective atmosphere, step 1 is weighed
Aluminum metal is heated to 250 DEG C of fusing point or more, the aluminum metal melted；
The protective atmosphere is nitrogen；
Stratiform precast body is wherein heated to 570 DEG C and the purpose for keeping the temperature 5h is to make organic matter in SiC powder raw cook such as
The decomposition such as fish oil, binder and plasticizer volatilization；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained
Melting aluminum metal cast in preheating stratiform precast body upper surface, then carry out Pressure Infiltration processing, when the aluminium of melting
It is cooling with the speed of 40 DEG C/min after metal is infiltrated up to completely in the stratiform precast body of preheating, it finally demoulds, obtains (SiCp/
Al)-Al laminar composite ingot casting, that is, complete；
The pressure applied when Pressure Infiltration processing is 80MPa, and the speed of infiltration is 1mm/s.
Fig. 1 is the microstructure picture of (SiCp/Al)-Al laminar composite prepared by embodiment 1；Wherein 1 is SiCp/
Al composite layer, 2 be Al layers；It can be seen from the figure that SiCp/Al composite layer and Al metal layer are alternately arranged, it is layer
Shape structure, SiCp/Al composite layer structural integrity, no destruction；Aluminum metal layer thickness is more uniform.
(SiCp/Al)-Al stratiform aluminum matrix composite, density 2.79g/cm are prepared in the present embodiment3, springform
Amount is 108GPa, bending strength 750MPa, yield strength 334MPa, tensile strength 452MPa, elongation percentage 22.4%；
Embodiment 2:
Doctor-blade casting process, stacked-foil method and pressure infiltration method of the present invention combine the method for preparation stratiform aluminum matrix composite specific
It sequentially includes the following steps:
One, weighing:
Weigh 35 parts of SiC powder, 40 parts of solvent, 0.05 part of dispersing agent, 20 parts of plasticising respectively by mass fraction
Agent, 4.95 parts of binder and 65 parts of aluminum metal are as raw material；
The purity of the SiC powder is greater than 97%, and average grain diameter is 5 μm；
The SiC powder is that SiC powder is 6H-SiC powder；
The solvent is dehydrated alcohol and the n-butanol mixture of 1:1 in mass ratio；Dehydrated alcohol purity > 97%, positive fourth
Alcohol purity >=99.5%；
The dispersing agent is fish oil；Specially liquid catfish fish oil, purity > 99%；
The plasticizer is tributyl phosphate, purity >=99%；
The binder is polyvinyl butyral resin powder, and granularity is 100 mesh；
The aluminum metal is fine aluminium；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound is carried out to mixed slurry
Dispersion, the mixed slurry after then dispersing ultrasonic wave are placed in ball mill, and the oxidation that diameter is 30mm is added into ball mill
Aluminium ball simultaneously carries out ball milling for the first time, and the weighed plasticizer of step 1 and binder are then added into ball mill and carries out secondary ball
Mill, obtains SiC slurry；
Ultrasonic power when the progress ultrasonic disperse is 400W, and the ultrasonic disperse time is 1min；
It is described progress for the first time ball milling when rotational speed of ball-mill be 500r/min, Ball-milling Time 2h；Carry out ball milling when secondary ball milling
Revolving speed is 500r/min, and Ball-milling Time is for 24 hours；
Wherein, the purpose of ultrasonic disperse is to keep SiC powder evenly dispersed in the slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained, which is placed in environment under low pressure, stands 5min, then carries out tape casting and obtains green compact；
Green compact are air-dried 3h at room temperature, obtain the stratiform SiC powder raw cook with a thickness of 0.1mm；
Base band uses polypropylene material during the tape casting, and 0.2mm, the travel speed of base band is arranged in scraper height
For 0.1mm/s；
The air pressure of the environment under low pressure be lower than standard atmospheric pressure, specially 1 × 103Pa；
Wherein, the purpose that green compact are air-dried to 3h at room temperature is to remove the Flux Volatilization in green compact；By SiC slurry
Being placed in environment under low pressure the purpose of standing 5min is to carry out degassing processing, to remove the bubble for introducing slurry in mechanical milling process；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 3 layers of aluminum metallic foil are placed between adjacent SiC powder raw cook
Stacking block is obtained, stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；Single layer aluminum metallic foil with a thickness of 50 μ
m；
The technique of the cold pressing treatment are as follows: 0.4MPa and pressure maintaining 10min are forced into the pressing speed of 3mm/min；
Wherein, (SiCp/Al)-Al is realized in the number of plies for changing the aluminum metallic foil placed between adjacent SiC powder raw cook
The thickness of aluminum metal layer is accurately adjusted in laminar composite；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, it is under protective atmosphere, stratiform is pre-
Body processed is heated to 600 DEG C and keeps the temperature 10h, the stratiform precast body preheated；It is simultaneously under protective atmosphere, step 1 is weighed
Aluminum metal is heated to 350 DEG C of fusing point or more, the aluminum metal melted；
The protective atmosphere is argon gas；
Stratiform precast body is wherein heated to 600 DEG C and the purpose for keeping the temperature 10h is to make organic matter in SiC powder raw cook such as
The decomposition such as fish oil, binder and plasticizer volatilization；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained
Melting aluminum metal cast in preheating stratiform precast body upper surface, then carry out Pressure Infiltration processing, when the aluminium of melting
It is cooling with the speed of 20 DEG C/min after metal is infiltrated up to completely in the stratiform precast body of preheating, it finally demoulds, obtains (SiCp/
Al)-Al laminar composite ingot casting, that is, complete；
The pressure applied when Pressure Infiltration processing is 100MPa, and the speed of infiltration is 5mm/s.
(SiCp/Al)-Al stratiform aluminum matrix composite, through detecting, density 2.72g/ are prepared in the present embodiment
cm3, elasticity modulus 135GPa, bending strength 352MPa, yield strength 143MPa, tensile strength 226MPa extend
Rate is 24.9%.
Embodiment 3:
A kind of method that doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum matrix composite is specifically pressed
Following steps carry out:
One, weighing:
Weigh 5 parts of SiC powder, 20 parts of solvent respectively by mass fraction, 0.01 part of dispersing agent, 5 parts of plasticizer,
69.9 parts of binder and 95 parts of aluminum metal are as raw material；
The purity of the SiC powder is greater than 97%, and average grain diameter is 25 μm；
The SiC powder is the mixed-powder of 4H-SiC powder and 6H-SiC powder, 4H-SiC powder in mixed-powder
Mass fraction is 30%；
The solvent is dehydrated alcohol and the n-butanol mixture of 0.8:1 in mass ratio；Dehydrated alcohol purity > 97%, just
Butanol purity >=99.5%；
The dispersing agent is fish oil；Specially liquid catfish fish oil, purity > 99%；
The plasticizer is tributyl phosphate, purity >=99%；
The binder is polyvinyl butyral resin powder, and granularity is 100 mesh；
The aluminum metal is Al-Cu-Mg alloy；The mass fraction that wherein mass fraction of Cu is 2.5%, Mg is 3%；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound is carried out to mixed slurry
Dispersion, the mixed slurry after then dispersing ultrasonic wave are placed in ball mill, and the oxidation that diameter is 20mm is added into ball mill
Aluminium ball simultaneously carries out ball milling for the first time, and the weighed plasticizer of step 1 and binder are then added into ball mill and carries out secondary ball
Mill, obtains SiC slurry；
Ultrasonic power when the progress ultrasonic disperse is 300W, and the ultrasonic disperse time is 5min；
It is described progress for the first time ball milling when rotational speed of ball-mill be 300r/min, Ball-milling Time be for 24 hours；Carry out ball milling when secondary ball milling
Revolving speed is 300r/min, Ball-milling Time 80h；
Wherein, the purpose of ultrasonic disperse is to keep SiC powder evenly dispersed in the slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained, which is placed in environment under low pressure, stands 3min, then carries out tape casting and obtains green compact；
Green compact are air-dried 10h at room temperature, obtain the stratiform SiC powder raw cook with a thickness of 0.7mm；
Base band uses polypropylene material during the tape casting, and 3mm is arranged in scraper height, and the travel speed of base band is
5mm/s；
The air pressure of the environment under low pressure be lower than standard atmospheric pressure, specially 1 × 10-1Pa；
Wherein, the purpose that green compact are air-dried to 10h at room temperature is to remove the Flux Volatilization in green compact；SiC is starched
Expecting to be placed in environment under low pressure the purpose of standing 3min is to carry out degassing processing, to remove the bubble for introducing slurry in mechanical milling process；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 1 layer of aluminum metallic foil is placed between adjacent SiC powder raw cook
Stacking block is obtained, stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；Single layer aluminum metallic foil with a thickness of 35 μ
m；
The technique of the cold pressing treatment are as follows: 0.2MPa and pressure maintaining 35min are forced into the pressing speed of 1mm/min；
Wherein, (SiCp/Al)-Al is realized in the number of plies for changing the aluminum metallic foil placed between adjacent SiC powder raw cook
The thickness of aluminum metal layer is accurately adjusted in laminar composite；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, it is under protective atmosphere, stratiform is pre-
Body processed is heated to 500 DEG C and keeps the temperature 6h, the stratiform precast body preheated；It is simultaneously under protective atmosphere, step 1 is weighed
Aluminum metal is heated to 300 DEG C of fusing point or more, the aluminum metal melted；
The protective atmosphere is helium；
Stratiform precast body is wherein heated to 500 DEG C and the purpose for keeping the temperature 6h is to make organic matter in SiC powder raw cook such as
The decomposition such as fish oil, binder and plasticizer volatilization；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained
Melting aluminum metal cast in preheating stratiform precast body upper surface, then carry out Pressure Infiltration processing, when the aluminium of melting
It is cooling with the speed of 30 DEG C/min after metal is infiltrated up to completely in the stratiform precast body of preheating, it finally demoulds, obtains (SiCp/
Al)-Al laminar composite ingot casting, that is, complete；
The pressure applied when Pressure Infiltration processing is 50MPa, and the speed of infiltration is 3mm/s.
(SiCp/Al)-Al stratiform aluminum matrix composite, through detecting, density 2.75g/ are prepared in the present embodiment
cm3, elasticity modulus 82.3GPa, bending strength 913MPa, yield strength 466MPa, tensile strength 725MPa extend
Rate is 6.2%.
Claims (10)
1. a kind of method that doctor-blade casting process, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum matrix composite, feature
Be: this method specifically sequentially includes the following steps:
One, weighing:
Weighed respectively by mass fraction 5~35 parts of SiC powder, 20~50 parts of solvent, 0.01~0.5 part of dispersing agent, 5~
20 parts of plasticizer, 4.5~69.9 parts of binder and 65~95 parts of aluminum metal are as raw material；
The solvent is dehydrated alcohol and n-butanol (0.5~1) in mass ratio: 1 mixture；
The dispersing agent is fish oil；
The plasticizer is tributyl phosphate；
The binder is polyvinyl butyral resin powder；
Two, prepared by SiC slurry:
The weighed SiC powder of step 1, solvent and dispersant are obtained into mixed slurry, ultrasound point is carried out to mixed slurry
It dissipates, the mixed slurry after then dispersing ultrasonic wave is placed in ball mill, and the oxygen that diameter is 5mm~30mm is added into ball mill
Change aluminium ball and carry out ball milling for the first time, the weighed plasticizer of step 1 and binder are then added into ball mill and carry out secondary ball
Mill, obtains SiC slurry；
Three, SiC powder raw cook tape casting:
The SiC slurry that step 2 is obtained is placed in 1~5min of standing in environment under low pressure, then carries out tape casting and obtains green compact；
Green compact are air-dried to 3 at room temperature~for 24 hours, obtain the stratiform SiC powder raw cook with a thickness of 0.1~2.5mm；
Four, stacking precast body preparation:
The resulting SiC powder raw cook of step 3 is stacked, 1~5 layer of aluminum metallic foil is placed between adjacent SiC powder raw cook and is obtained
To stacking block, stacking block is fitted into mold and carries out cold pressing treatment, obtains stratiform precast body；
The material of the aluminum metallic foil is identical as a kind of material of aluminum metal of step；Aluminum metallic foil described in single layer with a thickness of 20 μm
~50 μm；
Five, degreasing processing and mold preheating:
The resulting stratiform precast body of step 4 and mold are put into togerther in heating furnace, under protective atmosphere, by stratiform precast body
It is heated to 470 DEG C~Tm and keeps the temperature 2~10h, the stratiform precast body preheated；Simultaneously under protective atmosphere, step 1 is claimed
The aluminum metal taken is heated to 250~350 DEG C of fusing point or more, the aluminum metal melted；The Tm is the fusing point of aluminum metallic foil；
Six, liquid aluminium infiltrates:
The mold for the stratiform precast body equipped with preheating that step 5 obtains is placed on pressing machine table-board, step 5 is obtained molten
The aluminum metal melted casts in the upper surface of the stratiform precast body of preheating, Pressure Infiltration processing is then carried out, when the aluminum metal of melting
It is cooling with the speed of 20~40 DEG C/min after being infiltrated up in the stratiform precast body of preheating completely, it finally demoulds, obtains (SiCp/
Al)-Al laminar composite ingot casting, that is, complete.
2. doctor-blade casting process according to claim 1, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: SiC powder described in step 1 is any combination of one or more of 3C, 2H, 4H, 6H；
The average grain diameter of SiC powder is 0.3~50 μm.
3. doctor-blade casting process according to claim 1 or 2, stacked-foil method and pressure infiltration method combine preparation stratiform aluminum-base composite
The method of material, it is characterised in that: aluminum metal described in step 1 is fine aluminium or aluminium alloy block.
4. doctor-blade casting process according to claim 3, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: the aluminium alloy be Al-Si alloy, made of Al-Cu alloy, Al-Mg alloy, Al-Si-Cu alloy,
Al-Si-Mg alloy, Al-Cu-Mg alloy, Al-Zn-Cu alloy, Al-Zn-Mg-Cu alloy, Al-Be alloy, Al-Li alloy,
The mixture of one or more of Al-Si-Cu-Mg alloy；In the Al-Si alloy mass fraction of Si be 0.5%~
25%；The mass fraction of Cu is 0.5%~53% in the made of Al-Cu alloy；The mass fraction of Mg is in the Al-Mg alloy
0.5%~38%；The mass fraction that the mass fraction of Si is 0.5%~25%, Cu in Al-Si-Cu alloy is 0.5%~
53%；The mass fraction that the mass fraction of Si is 0.5%~25%, Mg in Al-Si-Mg alloy is 0.5%~38%；Al-Cu-
The mass fraction that the mass fraction of Cu is 0.5%~53%, Mg in Mg alloy is 0.5%~38%；Zn in Al-Zn-Cu alloy
Mass fraction be 0.5%~55%, Cu mass fraction be 0.5%~53%；The quality of Zn point in Al-Zn-Mg-Cu alloy
The mass fraction that the mass fraction that number is 0.5%~55%, Mg is 0.5%~38%, Cu is 0.5%~53%；Al-Be alloy
The mass fraction of middle Be is 0.5%~20%；The mass fraction of Li is 0.5%~35% in Al-Li alloy；Al-Si-Cu-Mg
The mass fraction that the mass fraction that the mass fraction of alloy Si is 0.5%~25%, Cu is 0.5%~53%, Mg is 0.5%~
38%.
5. doctor-blade casting process according to claim 1,2 or 4, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base multiple
The method of condensation material, it is characterised in that: ultrasonic power when carrying out ultrasonic disperse described in step 2 is 200~400W, ultrasound
Jitter time is 1~10min.
6. doctor-blade casting process according to claim 5, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: it is 10~500r/min that rotational speed of ball-mill when ball milling for the first time is carried out described in step 2, and Ball-milling Time is
2~48h；Carrying out rotational speed of ball-mill when secondary ball milling is 10~500r/min, and Ball-milling Time is 24~96h.
7. doctor-blade casting process according to claim 6, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: base band uses polypropylene material, the setting of scraper height during tape casting described in step 3
0.2~3mm, the travel speed of base band are 0.1~10mm/s.
8. doctor-blade casting process according to claim 7, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: the air pressure of environment under low pressure described in step 3 be lower than standard atmospheric pressure, specially 1 × 10-1~1 ×
105Pa。
9. doctor-blade casting process according to claim 8, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: the technique of cold pressing treatment described in step 4 are as follows: be forced into the pressing speed of 0.1~3mm/min
0.02~0.4MPa and 10~60min of pressure maintaining.
10. doctor-blade casting process according to claim 9, stacked-foil method and pressure infiltration method combine preparation stratiform aluminium base composite wood
The method of material, it is characterised in that: the pressure applied when the processing of Pressure Infiltration described in step 6 is 50~100MPa, the speed of infiltration
For 1~5mm/s.
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