CN109763012A - The preparation method of flux foaming enhancing foamed aluminium composite foamable agent - Google Patents
The preparation method of flux foaming enhancing foamed aluminium composite foamable agent Download PDFInfo
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- CN109763012A CN109763012A CN201910058579.XA CN201910058579A CN109763012A CN 109763012 A CN109763012 A CN 109763012A CN 201910058579 A CN201910058579 A CN 201910058579A CN 109763012 A CN109763012 A CN 109763012A
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Abstract
The preparation method of flux foaming enhancing foamed aluminium composite foamable agent, belong to foam metal material and processing technique field, and in particular to a kind of enhancing foamed aluminium composite material that flux foaming is enhanced the preparation method of foamed aluminium composite foamable agent and prepared using the composite foamable agent.Ball milling is carried out it is characterized by: the foaming agent of weight percent 5% ~ 20%, 0.5% ~ 6% reinforcing agent and 76% ~ 85% fine aluminium or aluminum alloy granule are added in mixing and ball milling machine, blowing-agent particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type by mixing and ball milling technique, form composite foamable agent.Experiments have shown that adding flux foaming of the present invention under identical preparation condition enhances foamed aluminium Al/TiH2The enhancing foamed aluminium composite material of/GNFs composite foamable agent preparation, hole bubble refinement are reduced to 0.81mm by average diameter 1.38mm, and mechanical property promotes > 25%.
Description
Technical field
Flux foaming enhances the preparation method of foamed aluminium composite foamable agent, belongs to foam metal material and processing technology neck
Domain, and in particular to the preparation method of flux foaming enhancing foamed aluminium composite foamable agent a kind of and prepared using the composite foamable agent
Enhance foamed aluminium composite material.
Background technique
Currently, the Investigation on intensification of foamed aluminium material performance focuses mostly on mutually to enhance in particle mutually to be enhanced with fiber, and two kinds of increasings
Qiang Xiangjun is introduced in the thickening process of foamed aluminium material preparation process.The particulates reinforcements of foamed aluminium composite material mainly have SiC,
Al2O3And TiB2Deng researcher has done largely the stability and mechanical properties of liquid foam in particle size, content
Research.In terms of the stability to liquid foam: reinforced phase increases the viscosity of melt, and the mobility for reducing melt slows down analysis
Liquid speed rate；The particle for being attached to liquid film surface meet change liquid film radius of curvature reduce capillary force liquid in film is suck
Suction effect；Particle inside liquid film mutually assembles blocking and forms barrier, hinders the outflow of melt in film, and hinders liquid film two sides
The overlapping of gas/liquid phase interface, the final stability reinforcing for realizing liquid foam.In terms of mechanical property reinforcing, particle phase is improved
Volume fraction can be in the mechanical property for improving foamed aluminium composite material lower to a certain degree, but the smooth stress of foamed aluminium material is answered
Varied curve shape is also transformed into zigzag；The reinforcing effect of the particle opposed foam aluminum material of nanoscale is better than micron order
Grain phase, and nanoscale particle opposed foam aluminium inner cell form has good effect of optimization.
Graphene nanosheet (graphene nanoflakes, GNFs) is to be currently known the highest material of intensity,
Intensity and elasticity modulus are up to 125GPa and 1100Gpa.Test result proves that the addition of reinforced phase GNFs not only increases AMCs
Tensile strength, also improve material elongation percentage.But it is due to GNFs surface energy with higher and poor with aluminum melt wetting effect,
This makes it be easy to occur to reunite in aluminum melt to cause Dispersion of Reinforcement uneven.Therefore, AMCs in current most of researchs reports
The preparation method of material is powder metallurgic method, rarely has the correlative study report that GNFs is directly added in aluminum melt.The application is
To graphene nanosheet strengthening foam aluminium (graphene nanoflakes enhanced aluminum foam, GNF ~
AF) the research achievement of the foam melt method technology of preparing of material.
Summary of the invention
The technical problem to be solved by the present invention is overcoming the deficiencies of the prior art and provide one kind can be realized GNFs dispersion
The preparation method of uniform flux foaming enhancing foamed aluminium composite foamable agent, and pass through foam melt method using this foaming agent
Prepare the preparation method of graphene nanosheet strengthening foam aluminium.
The technical solution adopted by the present invention to solve the technical problems is: flux foaming enhances foamed aluminium composite foamable agent
Preparation method, it is characterised in that: at room temperature, by the foaming agent of weight percent 5% ~ 20%, 0.5% ~ 6% reinforcing agent and 76% ~
85% fine aluminium or aluminum alloy granule, which is added in mixing and ball milling machine, carries out ball milling, and Ball-milling Time is 3 ~ 24 hours, and rotational speed of ball-mill is
Blowing-agent particle and flaky graphite alkene GNFs are attached to by 100 ~ 500rpm by mixing and ball milling technique with inlaying suction type
Al particle forms composite foamable agent, wherein foaming agent TiH2、ZrH2Or MgH2；Reinforcing agent is single layer or few layer flake stone
Black alkene GNFs.
Preferably, foaming agent is the TiH of 300 ~ 425 mesh2、ZrH2Or MgH2；Reinforcing agent is single layer or few layer flaky graphite
Alkene GNFs, fine aluminium or aluminum alloy granule granularity are 50 ~ 400 mesh.
Preferably, foaming agent is the TiH of 300 ~ 425 mesh2, by mixing and ball milling technique by blowing-agent particle and laminar stone
Black alkene GNFs is attached to Al particle to inlay suction type, forms composite foamable agent Al/TiH2/GNFs。
Preferably, the weight percent group of each ingredient becomes foaming agent 16% ~ 20%, reinforcing agent 4% ~ 5%, pure aluminum or aluminum alloy
Particle 76% ~ 80%.
Preferably, the ratio of the foaming agent and reinforcing agent is 4:1.
Experiments have shown that foaming agent TiH2It is unobvious that additive amount lacks foaming effect, and addition excessively easily causes hole bubble excessive.Enhancing
The very few strengthening effect of agent graphene addition is unobvious, and addition excessively be easy to cause graphene to reunite, and deteriorates the mechanics of material instead
Performance.In every 32g aluminium powder, 6 ~ 8gTiH is added2, 1.5 ~ 2g graphene, effect is ideal.
The main application of ball milling is every ingredient in evenly dispersed powder in powder metallurgy, avoids ingredient is unbalanced from causing
Foam aluminum pore is uneven after foaming, mostly uses dispersing agent for improving the dispersion of ingredient in the method, and postposition process needs
Remove additive, complex procedures.Ball milling is useful in that TiH in the application composite foamable agent2It inlays with graphene to Al
On grain, composite particles structure is formed the experiment has found that Ball-milling Time is appropriately extended and can realize and preferably inlays.The biggish Al of density
Particle can be used as carrier and graphene be introduced to aluminium alloy melt, avoid individually adding dust phenomenon caused by graphene.
The invention further relates to a kind of flux foamings to enhance foamed aluminium composite material, it is characterised in that: by fine aluminium or aluminium
Alloying pellet adds the metal Ca particle of weight percent 0.8 ~ 2% and stirs carrying out melt increasing after 680 DEG C ~ 780 DEG C meltings
It is viscous, regulate and control alloy melt temperature to 660 DEG C ~ 710 DEG C, the above-mentioned composite foamable agent of addition 5 ~ 10% is carried out into alloy melt
High-speed stirred mixing；After stirring, closes bell and carry out thermal insulation foaming；Cooling is taken out after 3 ~ 6 minutes from furnace, obtains aperture
The flux foaming enhancing foamed aluminium composite material being evenly distributed.
Preferably, it adds the metal Ca particle of weight percent 1.2% and stirs and carry out melt thickening.
The additive amount of the composite foamable agent accounts for the 5 ~ 8% of pure aluminum or aluminum alloy total amount.Single layer or few layer flaky graphite alkene
The additive amount of GNFs reinforcing agent accounts for about the 0.2% of alloy melt total amount.
The type of cooling is cooling for water mist.
The high-speed stirred is specially to be stirred 30 ~ 90 seconds with 2500 ~ 4500 revs/min of revolving speed.
After stirring, 2 ~ 6 minutes are kept the temperature at 660 ~ 710 DEG C and is foamed.
Flux foaming enhancing foamed aluminium composite material mesoporous bulb diameter obtained is 0.75 ~ 0.9mm.
Compared with prior art, possessed by flux foaming enhancing foamed aluminium composite foamable agent of the present invention and preparation method thereof
Beneficial effect is: composite foamable agent is prepared using mixing and ball milling technique, by adjusting material prescription and low energy milling parameters,
Optimize the performance of composite foamable agent.GNF ~ AF material preparation in, reinforced phase GNFs is a kind of flake structure, and this mutually have than
Grain mutually with the mutually higher specific surface area of fiber.With can the Al particle of high plastic deformation be carrier, will be sent out by mixing and ball milling technique
Infusion TiH2、ZrH2Or MgH2Particle and flake GNFs are attached to Al particle to inlay suction type and are introduced to aluminium alloy melt.
By adjusting factors such as the constituent of composite foamable agent, ratio of grinding media to material, rotational speed of ball-mill and Ball-milling Times, realize in composite foamable agent
GNFs and foaming agent uniformly inlay cladding in Al particle surface, and the GNFs material of difficult wetting easy to reunite is introduced to foamed aluminium material
It is interior, strengthening foam aluminum material performance.It can clearly be found out by Fig. 4, be prepared by above-mentioned mixing and ball milling technique composite foamed
In agent, laminar GNFs graphene uniform is embedded on alumina particles.
Laminar GNFs easy to reunite is introduced in aluminium alloy melt for carrier using auxiliary reagent particle, utilizes machinery
The shearing force that stirring generates promotes composite foamable agent melting intracorporal evenly dispersed, while utilizing foaming agent in mixed processes
TiH2、ZrH2Or MgH2Particle thermal decomposition generate high pressure gas promote GNFs melt it is intracorporal evenly dispersed.Preliminary Results
It was found that GNFs reinforced phase is deposited on the inner surface of hole bubble, and not shown obvious agglomeration, show the improvement by preparation process
GNFs can be added by foam melt method technique into aluminium alloy melt.Laminar GNFs is to be attached to Al particle surface
Mode introduces alloy melt, the foaming agent TiH that Al particle surface is inlayed2、ZrH2Or MgH2The gas that particle thermal decomposition generates can push away
Dynamic GNFs is moved to air liquid interface, final to realize that flake GNFs deposits to form a story frame structure in steep that wall inner surface, is improved
Steep that wall mechanical property improves hole and steeps pattern, realizes the improvement of foamed aluminium material internal pore structure.Experiments have shown that identical preparation
Under the conditions of addition flux foaming of the present invention enhancing foamed aluminium composite foamable agent preparation enhancing foamed aluminium composite material, hole is steeped
Refinement is reduced to 0.81mm by average diameter 1.38mm, and mechanical property promotes > 25%.
Detailed description of the invention
Fig. 1 is the enhancing foamed aluminium composite material sample prepared in comparative example and embodiment 1 ~ 4, is obtained after grinding and polishing
Product section photo.
Fig. 2 is 1 ~ 4 sample well bulb diameter histogram of comparative example and embodiment.
Fig. 3 is 1 ~ 4 sample mechanical performance data figure of comparative example and embodiment.
Fig. 4 is the Electronic Speculum micrograph that graphene is embedded in Al particle surface in composite foamable agent.
Specific embodiment
Embodiment 1 ~ 8 is specific embodiment of the present invention, wherein embodiment 3 is preferred embodiment.
Embodiment 1
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 2g granularity at room temperature2Foaming agent,
0.5g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 37.5g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule add
Enter and carry out ball milling in mixing and ball milling machine, Ball-milling Time is 3 hours, rotational speed of ball-mill 400rpm, will be sent out by mixing and ball milling technique
Infusion particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/
GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 40g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 5% of pure aluminum or aluminum alloy total amount, wherein the additive amount of reinforcing agent GNFs is about
Account for the 0.05% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes cold
But, the flux foaming enhancing foamed aluminium composite material of even aperture distribution, measured hole bulb diameter average out to 1.2mm are obtained.
Embodiment 2
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 5g granularity at room temperature2Foaming agent,
1g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 36g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule are added and mix
It closes in ball mill and carries out ball milling, Ball-milling Time is 4 hours, rotational speed of ball-mill 450rpm, by mixing and ball milling technique by foaming agent
Particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 42g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 5.25% of pure aluminum or aluminum alloy total amount, wherein the addition of reinforcing agent GNFs
Amount accounts for about the 0.1% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes
It is cooling, the flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 1.02mm.
Embodiment 3
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 8g granularity at room temperature2Foaming agent,
2g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 32g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule are added and mix
It closes in ball mill and carries out ball milling, Ball-milling Time is 6 hours, rotational speed of ball-mill 450rpm, by mixing and ball milling technique by foaming agent
Particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 42g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 5.25% of pure aluminum or aluminum alloy total amount, wherein the addition of reinforcing agent GNFs
Amount accounts for about the 0.2% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes
It is cooling, the flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.81mm.
Embodiment 4
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 7g granularity at room temperature2Foaming agent,
3.5g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 53.5g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule add
Enter and carry out ball milling in mixing and ball milling machine, Ball-milling Time is 12 hours, rotational speed of ball-mill 500rpm, will be sent out by mixing and ball milling technique
Infusion particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/
GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 64g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 8% of pure aluminum or aluminum alloy total amount, wherein the additive amount of reinforcing agent GNFs is about
Account for the 0.4% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；Cooling is taken out after 3 ~ 6 minutes from furnace,
The flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.8mm.
Embodiment 5
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 8.8g granularity at room temperature2Foaming
Agent, 2.2g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 69g granularity are the fine aluminium or aluminum alloy granule of 50 ~ 400 mesh
It is added in mixing and ball milling machine and carries out ball milling, Ball-milling Time is 16 hours, rotational speed of ball-mill 250rpm, will by mixing and ball milling technique
Blowing-agent particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/
GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 64g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 10% of pure aluminum or aluminum alloy total amount, wherein the additive amount of reinforcing agent GNFs
Account for about the 0.25% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes cold
But, the flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.81mm.
Embodiment 6
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the TiH of 300 ~ 425 mesh by 10g granularity at room temperature2Foaming agent,
2.5g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 30g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule are added
Ball milling is carried out in mixing and ball milling machine, Ball-milling Time is 24 hours, rotational speed of ball-mill 100rpm, will be foamed by mixing and ball milling technique
Agent particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/TiH2/
GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/TiH that above-mentioned 64g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 10% of pure aluminum or aluminum alloy total amount, wherein the additive amount of reinforcing agent GNFs
Account for about the 0.25% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes cold
But, the flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.8mm.
Embodiment 7
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the ZrH of 300 ~ 425 mesh by 6g granularity at room temperature2Foaming agent,
2g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 40g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule are added and mix
It closes in ball mill and carries out ball milling, Ball-milling Time is 3 hours, rotational speed of ball-mill 500rpm, by mixing and ball milling technique by foaming agent
Particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/ZrH2/GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 0.8% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/ZrH that above-mentioned 48g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 6% of pure aluminum or aluminum alloy total amount, wherein the additive amount of reinforcing agent GNFs is about
Account for the 0.2% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；Cooling is taken out after 3 ~ 6 minutes from furnace,
The flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.82mm.
Embodiment 8
Flux foaming enhancing foamed aluminium composite foamable agent is prepared, is the MgH of 300 ~ 425 mesh by 8g granularity at room temperature2Foaming agent,
2g single layer or few layer flaky graphite alkene GNFs reinforcing agent and 32g granularity are that the fine aluminium of 50 ~ 400 mesh or aluminum alloy granule are added and mix
It closes in ball mill and carries out ball milling, Ball-milling Time is 8 hours, rotational speed of ball-mill 450rpm, by mixing and ball milling technique by foaming agent
Particle and flaky graphite alkene GNFs are attached to Al particle to inlay suction type, form composite foamable agent Al/MgH2/GNFs。
Flux foaming enhancing foamed aluminium composite material is prepared, by 800g fine aluminium or aluminum alloy granule 680 DEG C ~ 780
DEG C melting after, add weight percent 1.2% metal Ca particle simultaneously stir carry out melt thickening, regulation alloy melt temperature extremely
660 DEG C ~ 710 DEG C, the composite foamable agent Al/MgH that above-mentioned 42g is prepared2/ GNFs is added in alloy melt, and carries out height
Speed is stirred, and composite foamable agent additive amount accounts for about the 5.25% of pure aluminum or aluminum alloy total amount, wherein the addition of reinforcing agent GNFs
Amount accounts for about the 0.2% of alloy melt total amount.After stirring, closes bell and carry out thermal insulation foaming；It is taken out from furnace after 3 ~ 6 minutes
It is cooling, the flux foaming enhancing foamed aluminium composite material of even aperture distribution is obtained, measured hole bulb diameter is 0.83mm.
Comparative example
Flux foaming enhancing foamed aluminium composite material is prepared, by fine aluminium or aluminum alloy granule after 680 DEG C ~ 780 DEG C meltings,
It adds the metal Ca particle of weight percent 1.2% and stirs and carry out melt thickening, regulation alloy melt temperature to 660 DEG C ~ 710
DEG C, 5% granularity is added as the TiH of 300 ~ 425 mesh2Foaming agent carries out high-speed stirred mixing into alloy melt；Stirring knot
Shu Hou closes bell and carries out thermal insulation foaming；Cooling is taken out after 3 ~ 6 minutes from furnace, obtains foamed aluminium composite material, is measured
Hole bulb diameter reaches 1.9mm or so, averagely about 1.38mm.
1 photo of attached drawing is derived from the same position of different samples, and through grinding and polishing, digital camera is taken pictures acquisition.Reference attached drawing 1 ~
3 as can be seen that only add general T iH in comparative example2As foaming agent, the foamed aluminium material hole prepared bubble is excessive, intensity compared with
It is low.With the raising of graphene adding proportion, hole bubble fineness tends to uniform refinement.In the mixed foaming agent that embodiment 3 is added,
TiH2Additive amount and graphene additive amount ratio are 4:1, the foamed aluminium material interstitial hole bubble refinement prepared, intensity highest.It is real
In the mixed foaming agent for applying the addition of example 4, TiH2Additive amount and graphene additive amount ratio are 2:1, prepared foamed aluminium material
Hole, which is steeped oneself-meeting, there is the non-uniform phenomenon in part, and as seen from Figure 3, with the increase of graphene additive amount, sample strength has elder generation
The trend reduced after raising.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (10)
1. the preparation method of flux foaming enhancing foamed aluminium composite foamable agent, it is characterised in that: at room temperature, by weight percent 5%
~ 20% foaming agent, 0.5% ~ 6% reinforcing agent and 76% ~ 85% fine aluminium or aluminum alloy granule be added mixing and ball milling machine in carry out ball
Mill, Ball-milling Time are 3 ~ 24 hours, and rotational speed of ball-mill is 100 ~ 500rpm, by mixing and ball milling technique by blowing-agent particle and thin slice
Shape graphene GNFs is attached to Al particle to inlay suction type, forms composite foamable agent, wherein foaming agent TiH2、ZrH2Or
MgH2；Reinforcing agent is single layer or few layer flaky graphite alkene GNFs.
2. the preparation method of flux foaming enhancing foamed aluminium composite foamable agent according to claim 1, it is characterised in that: at
Weight percent group is divided to become foaming agent 16% ~ 20%, reinforcing agent 4% ~ 5%, fine aluminium or aluminum alloy granule 76% ~ 80%.
3. the preparation method of flux foaming enhancing foamed aluminium composite foamable agent according to claim 1 or 2, feature exist
In: the adding proportion of the foaming agent and reinforcing agent is 4:1.
4. the preparation method of flux foaming enhancing foamed aluminium composite foamable agent according to claim 1 or 2, feature exist
In: the foaming agent granularity is 300 ~ 425 mesh, and fine aluminium or aluminum alloy granule granularity are 50 ~ 400 mesh.
5. a kind of flux foaming enhances foamed aluminium composite material, it is characterised in that: by fine aluminium or aluminum alloy granule at 680 DEG C
After ~ 780 DEG C of meltings, adds the metal Ca particle of weight percent 0.8% ~ 2% and stir carrying out melt thickening, regulate and control alloy melt
Temperature to 660 DEG C ~ 710 DEG C, addition 5 ~ 10% the described in any item composite foamable agents of claim 1 ~ 4 into alloy melt, and
Carry out high-speed stirred mixing；After stirring, closes bell and carry out thermal insulation foaming；Cooling is taken out after 3 ~ 6 minutes from furnace, is obtained
The flux foaming of even aperture distribution enhances foamed aluminium composite material.
6. flux foaming according to claim 5 enhances foamed aluminium composite material, it is characterised in that: the compound hair
The additive amount of infusion accounts for the 5 ~ 8% of fine aluminium or aluminum alloy granule total amount.
7. flux foaming according to claim 5 enhances foamed aluminium composite material, it is characterised in that: the high-speed stirring
It mixes and is specially stirred 30 ~ 90 seconds with 2500 ~ 4500 revs/min of revolving speed.
8. flux foaming according to claim 5 enhances foamed aluminium composite material, it is characterised in that: stirring terminates
Afterwards, 2 ~ 6 minutes are kept the temperature at 660 ~ 710 DEG C to foam.
9. flux foaming according to claim 5 enhances foamed aluminium composite material, it is characterised in that: the cooling side
Formula is cooling for water mist.
10. flux foaming according to claim 5 enhances foamed aluminium composite material, it is characterised in that: obtained
It is 0.75 ~ 0.9mm that flux foaming, which enhances foamed aluminium composite material mesoporous bulb diameter,.
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| CN110216275A (en) * | 2019-06-03 | 2019-09-10 | 东睦新材料集团股份有限公司 | A kind of powder metallurgy alumina-base material and preparation method thereof |
| CN110216276A (en) * | 2019-06-03 | 2019-09-10 | 东睦新材料集团股份有限公司 | A kind of powder metallurgy alumina-base material and preparation method thereof |
| CN111101012A (en) * | 2020-01-16 | 2020-05-05 | 太原理工大学 | Preparation method of closed-cell gradient foam material |
| CN111172419A (en) * | 2020-01-21 | 2020-05-19 | 山东交通学院 | Basalt particle reinforced foam aluminum alloy and preparation method and application thereof |
| CN112746192A (en) * | 2020-12-17 | 2021-05-04 | 北京科技大学 | Foaming agent, preparation method thereof and method for preparing foamed aluminum or aluminum alloy |
| CN113186420A (en) * | 2021-03-24 | 2021-07-30 | 东北大学 | Device and method for preparing foamed aluminum based on electromagnetic stirring under action of composite magnetic field |
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| CN110216276A (en) * | 2019-06-03 | 2019-09-10 | 东睦新材料集团股份有限公司 | A kind of powder metallurgy alumina-base material and preparation method thereof |
| CN110142402B (en) * | 2019-06-03 | 2022-01-25 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum-based material and preparation method thereof |
| CN110216276B (en) * | 2019-06-03 | 2022-01-25 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum-based material and preparation method thereof |
| CN110216275B (en) * | 2019-06-03 | 2022-01-25 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum-based material and preparation method thereof |
| CN111101012A (en) * | 2020-01-16 | 2020-05-05 | 太原理工大学 | Preparation method of closed-cell gradient foam material |
| CN111101012B (en) * | 2020-01-16 | 2021-03-30 | 太原理工大学 | Preparation method of closed-cell gradient foam material |
| CN111172419A (en) * | 2020-01-21 | 2020-05-19 | 山东交通学院 | Basalt particle reinforced foam aluminum alloy and preparation method and application thereof |
| CN112746192A (en) * | 2020-12-17 | 2021-05-04 | 北京科技大学 | Foaming agent, preparation method thereof and method for preparing foamed aluminum or aluminum alloy |
| CN113186420A (en) * | 2021-03-24 | 2021-07-30 | 东北大学 | Device and method for preparing foamed aluminum based on electromagnetic stirring under action of composite magnetic field |
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