CN108796267A - A method of CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering - Google Patents
A method of CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering Download PDFInfo
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- CN108796267A CN108796267A CN201810732768.6A CN201810732768A CN108796267A CN 108796267 A CN108796267 A CN 108796267A CN 201810732768 A CN201810732768 A CN 201810732768A CN 108796267 A CN108796267 A CN 108796267A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1005—Pretreatment of the non-metallic additives
- C22C1/1015—Pretreatment of the non-metallic additives by preparing or treating a non-metallic additive preform
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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Abstract
The invention discloses a kind of methods preparing CuSiCp composite materials using differential pressure vacuum foundry engieering, are calculated by percentage by volume, including following components：30~35% aluminium alloy, 65~70% SiC particulate；Previously prepared SiC prefabrication types, composite material proportion shared by SiC prefabrication types are 65~70%；SiC prefabrication types are then packed into model, the copper liquid melted in advance is pressed into SiC prefabrication types by pressure；Finally under certain pressure difference, cooled and solidified prepares CuSiCp composite materials.The manufacturing technology used through the invention, composite material deflection is small, and the capacity of heat transmission is high, it can be ensured that the dimensional stability of processing.Manufacturing process is simple, it is easily operated, it can be achieved that produce in enormous quantities etc. advantage.
Description
Technical field
The invention belongs to field of metal matrix composite, and in particular to a kind of to prepare Cu/ using differential pressure vacuum foundry engieering
The method of SiCp composite materials.
Background technology
The Cu/SiCp composite materials being combined with copper alloy with SiC particulate have broad application prospects.Due to SiC
Particle has high specific strength and high ratio modulus, and coefficient of thermal expansion is low, there is certain conduction and heat conductivility.And copper alloy is with good
Heat conduction well, conduction, ductility, plastic deformation ability.Therefore, Cu/SiCp composite materials the two being combined have height
Heat conduction, conduction, low coefficient of thermal expansion and plastic deformation, can be widely applied to the necks such as Electronic Packaging, electrical contact, thermostabilization
Domain.
The common method for preparing Cu/SiCp composite materials mainly has：(1) solid state process, longest are shown in be powder metallurgic method,
The SiC powder and Cu powder that will centainly match after evenly mixing, are suppressed with particular manufacturing craft, and sintering is finally prepared to type.Technique is multiple
Miscellaneous, manufacturing cost is high.(2) liquid phase process includes mainly melt paddling process, and preparation method is simple, but be easy to be formed stomata, be mingled with,
The defects of reinforcement is unevenly distributed influences casting quality.Extrusion and vacuum pressure infiltration method, the two be required for it is previously prepared go out
SiC prefabrication types, extrusion be easy to cause the stomata in prefabrication type and are not easy to be discharged, and form cavity, shrinkage porosite.Prefabrication type easily becomes
The defects of shape and displacement.Vacuum pressure infiltration technology first extracts the air in prefabrication type out, molten metal is being pressed into mould with air pressure
In type, it is made to infiltrate prefabrication type, molds and take out after waiting it to solidify.(3) spray deposition, a kind of new complex method are excellent altogether
Point is that technique is quick, and metal segregation and grain coarsening are inhibited, and avoid deleterious interfacial from reacting, reinforcement is evenly distributed.It lacks
Point is that raw material is entrained by the flow of air, and composite material voidage is high, loose phenomenon.Process costs are high, need special equipment that cannot directly make
For at part.
Invention content
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of using true
Empty pressure casting process prepares the new method of Cu/SiCp composite materials.
The present invention uses following technical scheme：
A method of CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering, first use binder and pore creating material
SiC particulate is bonded together, SiC particulate is then prepared by prefabrication type part using dry-pressing formed mode, by the prefabrication type
Part drying is pre-sintered, and the SiC prefabricated components are placed in model and are preheated, then in Vacuum Differential Pressure Casting equipment, in advance by institute
It states the air inside model to drain only, makes to be in negative pressure state inside the model, copper liquid is then penetrated into the SiC prefabricated components
Inside, crystallization, solidification are prepared into CuSiCp composite materials.
Specifically, being as follows：
S1, the dimethyl silicone polymer for weighing mass percent 1.0~3.0%, 60.0~70.0% polyvinyl alcohol,
1.0~2.0% dodecyl trimethyl ammonium bromide, 20.0~30.0% hydroxymethyl-propyl cellulose sodium, 2.0~3.0%
Tributyl phosphate is more than 99.9% as raw material, the purity of each raw material；
In S2, pouring into of the raw material glue machine for weighing step S1, blend glue stuff is made；
S3, by weight percent 2.0~10.0% weigh the blend glue stuff of step S2,90.0~98.0% SiC
Particle is spare, and the purity of the blend glue stuff and SiC particulate is more than 99.9%；
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, are obtained uniformly mixed
SiC is granulated powder；
S5, the SiC for preparing step S4 are granulated powder, are positioned in dry pressing die set, are pressed into lamella SiC prefabrication types；
S6, the SiC prefabrication types prepared by step S5 are subjected to preheating dumping, it is 30~35% that porosity, which is made out,
SiC prefabrication type parts；
S7, it the SiC prefabrication types part prepared by step S6 is placed in casting mold carries out the pre-heat treatment；
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, copper liquid is passed through into compression
Air is pressed into casting mold, and two-way pressure chamber pressure force difference, crystallization and freezing is kept to open casting mold and take out CuSiCp composite castings.
Further, in step S2, describedization glue machine temperature is set as 80~100 DEG C, mixing speed is 60~100 turns/
Min is uniformly mixed.
Further, in step S5, the pressure for preparing the lamella SiC prefabrication types is 10MPa pressure, dwell time 10
~30s.
Further, in step S6, under 500~800 DEG C, nitrogen atmosphere protection, 3~4h is preheated.
Further, in step S7, the SiC prefabrication types part is preheating to 750~800 DEG C, in advance under nitrogen atmosphere protection
The hot time is 5.0~6.0h.
Further, in step S8, the indoor air of pressure is transferred in advance, and vacuum degree is made to reach -0.05MPa, casting mold temperature
Degree is 770 DEG C, and copper liquid temperature is 1100~1200 DEG C.
Further, the two-way pressure chamber pressure force difference is 0.8~1.0MPa, and the duration is 0~15min,.
Further, CuSiCp composite materials described in step S8 are made of porous structure SiC and copper alloy, described porous
The percentage by volume of structure SIC is 65~70%, and the percentage by volume of the copper alloy is 30~35%.
Compared with prior art, the present invention at least has the advantages that：
SiC particulate is bonded together using additives such as proportioned binder, pore creating materials by the present invention first, using dry
SiC particulate is prepared into the prefabrication type part of definite shape by molded mode, then dry prefabrication type part at a certain temperature,
It is pre-sintered, excludes the additives such as pore creating material, binder and cause a series of micropores inside SiC prefabricated components, also, micropore is a system
Row open-celled structure.Finally, SiC prefabricated components are placed in preprepared model and are preheating to certain temperature, it is then poor in vacuum
On die casting manufacturing apparatus, the air inside model is drained only in advance, makes to be in negative pressure state inside model, then copper liquid is certain
It under the action of pressure, is penetrated into inside SiC prefabricated components by the micropore of SiC prefabricated components, and crystallizes and solidify under pressure difference effect,
CuSiCp composite materials are prepared, simple for process, easy to operate, production cost is low, and equipment requirement is low, the negative pressure ring reached in advance
Border, it is only necessary to the pressure difference of 0.8~1.0MPa can completely penetrate into copper liquid inside SiC prefabricated components, and be well combined,
Inner void is few, and casting mold deflection is few.Process controllability is high, it can be achieved that producing in enormous quantities.
Further, for the temperature of setting glue machine as 50~100 DEG C, mixing speed is 60~100 turns/min, ensures solute
Fully dissolving, and each solute uniformly mixes.
Further, the pressure of lamella SiC prefabrication types is 10MPa pressure, and the dwell time is 10~30S, makes blend glue stuff
Active force between SiC powders is reinforced, and prefabrication type part has certain mechanical strength.
Further, prefabrication type part is preheated into 3-4h so that internal additives under 500-800 DEG C, nitrogen atmosphere protection
Fully volatilization, inside has a series of micropore, and micropore is trepanning.
Further, SiC prefabrication types part is preheating to 750~800 DEG C under nitrogen atmosphere protection, and preheating time is 5.0~
6.0h.Ensure prefabricated component thermally equivalent, prepares for infiltration.
Further, the indoor air of pressure to be transferred in advance, and vacuum degree is made to reach -0.05MPa, mold temperature is 700~
850 DEG C, copper liquid temperature is 1100-1200 DEG C.Stomata is excluded, dense structure's property is increased.Copper liquid reaches mobility best condition, casting
Type temperature properly infiltrates.
Further, two-way pressure chamber pressure force difference is 0.8~1.0MPa, and the duration is 0~15min, in two-way pressure
Copper liquid at the uniform velocity rises in stalk until infiltration is completed under the action of difference.
In conclusion the manufacturing technology used through the invention, composite material deflection is small, and the capacity of heat transmission is high, it can be ensured that
The dimensional stability of processing.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Description of the drawings
Fig. 1 is present invention vacuum pressure infiltration Casting Equipment schematic diagram；
Fig. 2 is heat conductivity contrast schematic diagram of the present invention；
Fig. 3 is the method for the present invention flow chart.
Wherein：1. air source；2. vacuum system；Pressurized tank on 3.；4. lower pressurized tank；5. casting mold；6. shackle；7. liter liquid
Pipe；8. copper liquid；9. resistance-heated furnace.
Specific implementation mode
Referring to Fig. 1, the present invention provides a kind of sides preparing CuSiCp composite materials using differential pressure vacuum foundry engieering
The vacuum pressure infiltration Casting Equipment that method uses includes casting mold 5, air source 1, vacuum system 2, upper pressurized tank 3, lower pressurized tank 4 and electricity
Hinder heating furnace 9, wherein upper that shackle 6 is arranged between pressurized tank 3 and lower pressurized tank 4,6 lower part of shackle connects with stalk 7
It connects, the other end of stalk 7 gos deep into the copper liquid 8 in the lower pressurized tank 4, and the casting mold 5 is arranged in upper pressurized tank 3, institute
Air source 1 and vacuum system 2 is stated to connect with the upper pressurized tank 3 and lower pressurized tank 4 respectively.
It only needs the pressure difference of 0.8~1.0MPa that can completely penetrate into copper liquid inside prefabricated component, and combines good
Good, inner void is few, and casting mold deflection is few, and process controllability is high, it can be achieved that producing in enormous quantities.The course of work first opens vacuum
System 2 when internal vacuum reaches -0.05Mpa, open resistance-heated furnace 9 with 5~10 DEG C/min persistently overheating 1100~
1200 DEG C are melt into copper liquid liquid 8 to copper ingot in lower pressurized tank 4, when 5 temperature of casting mold reaches 700~850 DEG C in upper pressurized tank 3, close
Vacuum system 2 and the gas passage towards upper pressurized tank 3 are closed, opening the control gas pressure intensity of air source 1 keeps two-way pressure pressure tank poor
Reach 0.8~1MPa, copper liquid 8 enters casting mold 5 under the action of pressure difference, by stalk 7 and completes infiltration.
First, SiC particulate is bonded together using additives such as proportioned binder, pore creating materials, using dry-pressing at
SiC particulate is prepared into the prefabrication type part of definite shape by type mode, is then dried prefabrication type part at a certain temperature, pre-burning
Knot excludes the additives such as pore creating material, binder and causes a series of micropores inside SiC prefabricated components, also, micropore is a series of opens
Pore structure.Finally, SiC prefabricated components are placed in preprepared model and are preheating to certain temperature, then cast in vacuum differential pressure
On manufacturing apparatus, the air inside model is drained only in advance, makes to be in negative pressure state inside model, then copper liquid is in certain pressure
Under the action of, it is penetrated into inside SiC prefabricated components, and crystallize and solidify under pressure difference effect, is prepared by the micropore of SiC prefabricated components
Go out Cu/SiCp composite materials.
Referring to Fig. 3, the invention discloses a kind of sides preparing CuSiCp composite materials using differential pressure vacuum foundry engieering
Method is as follows：
S1, the dimethyl silicone polymer for weighing mass percent 1.0-3.0%, 60.0~70.0% polyvinyl alcohol, 1.0
~2.0% dodecyl trimethyl ammonium bromide, 20.0~30.0% hydroxymethyl-propyl cellulose sodium, 2.0~3.0% phosphoric acid
Tributyl is more than 99.9% as raw material, the purity of each raw material.
In S2, pouring into of the raw material glue machine for weighing step S1, oil bath glue machine temperature is set as 80~100 DEG C,
Mixing speed is 60~100 turns/min until fully dissolving, and is uniformly mixed, the blend glue stuff is made.
S3, by weight percent 2.0~10.0% weigh the blend glue stuff of step S2,90.0~98.0% SiC
Particle is spare, and the purity of the blend glue stuff and SiC particulate is more than 99.9%.
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, are obtained uniformly mixed
It is granulated powder.
S5, the SiC for preparing step S4 are granulated powder, are positioned in preprepared dry pressing die set, in 10MPa
Under pressure and 10~30s dwell times act on, it is pressed into the effigurate lamella SiC prefabrication types of tool.
S6, the SiC prefabrication types for preparing step S5 preheat 3~4h under 500~800 DEG C, nitrogen atmosphere protection,
Internal additives are volatilized, SiC prefabrication type part of the porosity 30~35% is finally prepared.
S7, the SiC prefabrication types part prepared by step S6 is placed in casting mold, under nitrogen atmosphere protection, is preheating to
750~800 DEG C, preheating time controls in 5.0~6.0h.
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, transfers balancing gate pit in advance
Interior air, makes vacuum degree reach -0.05MPa, waits for mold temperature to 770 DEG C, copper liquid temperature is at 1100~1200 DEG C, by copper
Liquid is pressed by compressed air in casting mold, after two-way pressure chamber pressure is stablized, and keep two-way pressure chamber pressure force difference 0.8~
1.0MPa or so continues 10~15min, makes copper liquid crystallization and freezing under pressure, and it is multiple finally to open casting mold taking-up CuSiCp
Condensation material casting.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
Applying the component of example can be arranged and be designed by a variety of different configurations.Therefore, the present invention to providing in the accompanying drawings below
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of the selected of the present invention
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
S1, the dimethyl silicone polymer for weighing mass percent 1.0%, 60.0% polyvinyl alcohol, 1.0% dodecane
Base trimethylammonium bromide, 20.0% hydroxymethyl-propyl cellulose sodium, 2.0% tributyl phosphate as raw material, each described original
The purity of material is more than 99.9%.
In S2, pouring into of the raw material glue machine for weighing step S1, oil bath glue machine temperature is set as 80 DEG C, stirring is fast
It spends for 60 turns/min until fully dissolving, is uniformly mixed, the blend glue stuff is made.
S3, by weight percent 2.0% weigh the blend glue stuff of step S2,98.0% SiC particulate it is spare, it is described
The purity of blend glue stuff and SiC particulate is more than 99.9%.
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, are obtained uniformly mixed
It is granulated powder.
S5, the SiC for preparing step S4 are granulated powder, are positioned in preprepared dry pressing die set, in 10MPa
Under pressure and 10S dwell times act on, it is pressed into the effigurate lamella SiC prefabrication types of tool.
S6, the SiC prefabrication types for preparing step S5 preheat 3h, inside are added under 500 DEG C, nitrogen atmosphere protection
Add agent to volatilize, finally prepares SiC prefabrication type part of the porosity 30%.
S7, the SiC prefabrication types part prepared by step S6 is placed in casting mold, under nitrogen atmosphere protection, is preheating to
750 DEG C, preheating time controls in 5.0h.
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, transfers balancing gate pit in advance
Interior air, makes vacuum degree reach -0.05MPa, waits for mold temperature to 770 DEG C, copper liquid temperature passes through copper liquid at 1100 DEG C
Compressed air is pressed into casting mold, after two-way pressure chamber pressure is stablized, and is kept two-way pressure chamber pressure force difference in 0.8MPa or so, is held
Continuous 10min, makes copper liquid crystallization and freezing under pressure, finally opens casting mold and takes out CuSiCp composite castings.
Embodiment 2
S1, the dimethyl silicone polymer for weighing mass percent 2.0%, 65.0% polyvinyl alcohol, 1.5% dodecane
Base trimethylammonium bromide, 25.0% hydroxymethyl-propyl cellulose sodium, 2.5% tributyl phosphate as raw material, each described original
The purity of material is more than 99.9%.
In S2, pouring into of the raw material glue machine for weighing step S1, oil bath glue machine temperature is set as 90 DEG C, stirring is fast
It spends for 80 turns/min until fully dissolving, is uniformly mixed, the blend glue stuff is made.
S3, by weight percent 6.0% weigh the blend glue stuff of step S2,94.0% SiC particulate it is spare, it is described
The purity of blend glue stuff and SiC particulate is more than 99.9%.
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, are obtained uniformly mixed
It is granulated powder.
S5, the SiC for preparing step S4 are granulated powder, are positioned in preprepared dry pressing die set, in 10MPa
Under pressure and 20S dwell times act on, it is pressed into the effigurate lamella SiC prefabrication types of tool.
S6, the SiC prefabrication types for preparing step S5 preheat 3.5h under 650 DEG C, nitrogen atmosphere protection, will be internal
Additive volatilizees, and finally prepares SiC prefabrication type part of the porosity 33%.
S7, the SiC prefabrication types part prepared by step S6 is placed in casting mold, under nitrogen atmosphere protection, is preheating to
780 DEG C, preheating time controls 5.5.
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, transfers balancing gate pit in advance
Interior air, makes vacuum degree reach -0.05MPa, waits for mold temperature to 770 DEG C, copper liquid temperature passes through copper liquid at 1150 DEG C
Compressed air is pressed into casting mold, after two-way pressure chamber pressure is stablized, and is kept two-way pressure chamber pressure force difference in 0.9MPa or so, is held
Continuous 13min, makes copper liquid crystallization and freezing under pressure, finally opens casting mold and takes out CuSiCp composite castings.
Embodiment 3
S1, the dimethyl silicone polymer for weighing mass percent 3.0%, 70.0% polyvinyl alcohol, 2.0% dodecane
Base trimethylammonium bromide, 30.0% hydroxymethyl-propyl cellulose sodium, 3.0% tributyl phosphate as raw material, each described original
The purity of material is more than 99.9%.
In S2, pouring into of the raw material glue machine for weighing step S1, oil bath glue machine temperature is set as 100 DEG C, is stirred
Speed is 100 turns/min until fully dissolving, and is uniformly mixed, the blend glue stuff is made.
S3, by weight percent 10.0% weigh the blend glue stuff of step S2,90.0% SiC particulate it is spare, institute
The purity for stating blend glue stuff and SiC particulate is more than 99.9%.
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, are obtained uniformly mixed
It is granulated powder.
S5, the SiC for preparing step S4 are granulated powder, are positioned in preprepared dry pressing die set, in 10MPa
Under pressure and 30S dwell times act on, it is pressed into the effigurate lamella SiC prefabrication types of tool.
S6, the SiC prefabrication types for preparing step S5 preheat 4h, inside are added under 800 DEG C, nitrogen atmosphere protection
Add agent to volatilize, finally prepares SiC prefabrication type part of the porosity 35%.
S7, the SiC prefabrication types part prepared by step S6 is placed in casting mold, under nitrogen atmosphere protection, is preheating to
800 DEG C, preheating time controls in 6.0h.
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, transfers balancing gate pit in advance
Interior air, makes vacuum degree reach -0.05MPa, waits for mold temperature to 770 DEG C, copper liquid temperature passes through copper liquid at 1200 DEG C
Compressed air is pressed into casting mold, after two-way pressure chamber pressure is stablized, and is kept two-way pressure chamber pressure force difference in 1.0MPa or so, is held
Continuous 15min, makes copper liquid crystallization and freezing under pressure, finally opens casting mold and takes out CuSiCp composite castings.
As shown in Fig. 2, CuSiCp composite materials have thermal conductivity, and thermal conductivity section is larger.
A kind of method realization preparing CuSiCp composite materials using differential pressure vacuum foundry engieering of the present invention is simple for process, if
Standby simple in structure, easy to operate, production cost is low, may be implemented to produce in enormous quantities, prepared CuSiCp composite material thermal conductivities
Rate is high, good stability of the dimension.
The above content is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within claims of the present invention
Protection domain within.
Claims (9)
1. a kind of method preparing CuSiCp composite materials using differential pressure vacuum foundry engieering, it is characterised in that：First using bonding
SiC particulate is bonded together by agent and pore creating material, and SiC particulate is then prepared into prefabrication type part using dry-pressing formed mode, will
The prefabrication type part drying is pre-sintered, and the SiC prefabricated components are placed in model and are preheated, then in Vacuum Differential Pressure Casting equipment
On, the air inside the model is drained only in advance, makes to be in negative pressure state inside the model, copper liquid is then penetrated into institute
It states inside SiC prefabricated components, crystallization, solidification are prepared into CuSiCp composite materials.
2. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 1,
It is characterized in that, is as follows：
S1, the dimethyl silicone polymer for weighing mass percent 1.0~3.0%, 60.0~70.0% polyvinyl alcohol, 1.0~
2.0% dodecyl trimethyl ammonium bromide, 20.0~30.0% hydroxymethyl-propyl cellulose sodium, 2.0~3.0% tricresyl phosphate
Butyl ester is more than 99.9% as raw material, the purity of each raw material；
In S2, pouring into of the raw material glue machine for weighing step S1, blend glue stuff is made；
S3, by weight percent 2.0~10.0% weigh the blend glue stuff of step S2,90.0~98.0% SiC particulate
Spare, the purity of the blend glue stuff and SiC particulate is more than 99.9%；
S4, blend glue stuff described in step S3 and SiC particulate are added in comminutor, are granulated, obtain uniformly mixed SiC and make
Grain powder；
S5, the SiC for preparing step S4 are granulated powder, are positioned in dry pressing die set, are pressed into lamella SiC prefabrication types；
S6, the SiC prefabrication types prepared by step S5 are subjected to preheating dumping, it is pre- that the SiC that porosity is 30~35% is made out
Type part processed；
S7, it the SiC prefabrication types part prepared by step S6 is placed in casting mold carries out the pre-heat treatment；
S8, the SiC prefabrication types part that step S7 preheatings are completed is placed on counter-pressure casting machine, copper liquid is passed through into compressed air
It is pressed into casting mold, two-way pressure chamber pressure force difference, crystallization and freezing is kept to open casting mold and take out CuSiCp composite castings.
3. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, in step S2, sets describedization glue machine temperature as 80-100 DEG C, mixing speed is that 60-100 turns/min mixing is equal
It is even.
4. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, in step S5, the pressure for preparing the lamella SiC prefabrication types is 10MPa pressure, and the dwell time is 10~30s.
5. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, in step S6, under 500~800 DEG C, nitrogen atmosphere protection, preheats 3~4h.
6. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, in step S7, the SiC prefabrication types part is preheating to 750~800 DEG C, preheating time is under nitrogen atmosphere protection
5.0~6.0h.
7. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, in step S8, transfers the indoor air of pressure in advance, vacuum degree is made to reach -0.05MPa, mold temperature 770
DEG C, copper liquid temperature is 1100~1200 DEG C.
8. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 7,
It being characterized in that, the two-way pressure chamber pressure force difference is 0.8~1.0MPa, and the duration is 0~15min,.
9. a kind of method that CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering according to claim 2,
It is characterized in that, CuSiCp composite materials described in step S8 are made of porous structure SiC and copper alloy, the porous structure SiC
Percentage by volume be 65~70%, the percentage by volume of the copper alloy is 30~35%.
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| CN201810732768.6A Pending CN108796267A (en) | 2018-07-05 | 2018-07-05 | A method of CuSiCp composite materials are prepared using differential pressure vacuum foundry engieering |
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| CN107032826A (en) * | 2017-04-07 | 2017-08-11 | 西安明科微电子材料有限公司 | A kind of preparation method of hollow alumina ball/SiC reinforcement Cu-base composites |
| CN107034378A (en) * | 2017-04-07 | 2017-08-11 | 西安明科微电子材料有限公司 | A kind of hollow alumina ball/carborundum cooperates with the preparation method of reinforced aluminum matrix composites |
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| CN103981392A (en) * | 2014-05-28 | 2014-08-13 | 合肥工业大学 | Preparation method of diamond/metal-based composite material with high volume fraction |
| CN104046877A (en) * | 2014-06-23 | 2014-09-17 | 西安交通大学 | Directional porous SiC-Cu composite material for electronic packaging and preparation method thereof |
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Application publication date: 20181113 |