CN108285986B - High-volume fractional SiCp/Al composite material connection method - Google Patents

High-volume fractional SiCp/Al composite material connection method Download PDF

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Publication number
CN108285986B
CN108285986B CN201711433368.7A CN201711433368A CN108285986B CN 108285986 B CN108285986 B CN 108285986B CN 201711433368 A CN201711433368 A CN 201711433368A CN 108285986 B CN108285986 B CN 108285986B
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silicon carbide
precast body
connection
composite material
carbide precast
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CN108285986A (en
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曹琪
包建勋
张舸
崔聪聪
董斌超
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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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
    • 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
    • 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
    • C22C1/1021—Pretreatment of the non-metallic additives by preparing or treating a non-metallic additive preform the preform being ceramic
    • 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
    • C22C1/1073—Infiltration or casting under mechanical pressure, e.g. squeeze casting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/065—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on SiC

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Ceramic Products (AREA)

Abstract

The present invention relates to technical field of material, specifically disclose a kind of high-volume fractional SiCp/Al composite material connection method.Connection method of the present invention is comprising steps of S1, pre-processing to connection surface to the first silicon carbide precast body；S2, configuration connection slurry；S3, coating connection slurry, the second silicon carbide precast body is compressed rapidly the first silicon carbide precast body of coating connection slurry to connection surface, solidify under pressure condition；S4, the precast body after solidification is aoxidized, working process；S5, high-volume fractional SiCp/Al composite material is prepared using liquid phase method, realize the connection of high-volume fractional SiCp/Al composite material.The present invention is by combining the preparation of composite material with the connection of composite material, using the material same or similar with reinforcement ingredient in composite material as binder, eliminate binder in the prior art differ greatly with base material composition to be connect caused by thermal mismatching and the case where deform.

Description

High-volume fractional SiCp/Al composite material connection method
Technical field
The present invention relates to technical field of material, in particular to a kind of high-volume fractional SiCp/Al composite material connection Method.
Background technique
A kind of high-volume fractional SiCp/Al composite material of high-volume fractional is with density is low, specific stiffness is high, linear expansion coefficient Low, the features such as thermal conductivity is high, is widely used in the fields such as aerospace, precision instrument, Electronic Packaging.
High-volume fractional SiCp/Al composite material is due to its silicon carbide body fraction higher (50-75%) and silicon carbide Grain differs greatly with aluminium base aluminum alloy hardness, and difficulty of processing is larger, the process-cycle is longer.For due to some special constructions or by High-volume fractional SiCp/Al composite element to the limitation of composite material preparation process can not directly be machined or Silicon carbide precast body preparatory phase molding, it is therefore desirable to by the way of connection.Currently used high-volume fractional SiCp/Al is multiple Condensation material connects the mode frequently with welding, but since connecting material and base material have differences, their product matchings It is poor to be easy to cause joint area thermal stress big, it easily deforms, while base material can be in higher temperature in the welding process It can have a negative impact to base material interior microscopic tissue, influence composite property.
Summary of the invention
The present invention is directed to overcome the deficiencies of existing technologies, high-volume fractional SiCp/Al composite material in the prior art is solved It is thermal stress large deformation and high volume that connection method, which can not reduce the thermal mismatching between base material and connecting material and generate interconnecting piece, Score SiCp/Al composite material needs to generate base material interior microscopic institutional framework under hot environment negative in connection procedure The technical problems such as face sound, provide a kind of novel high-volume fractional SiCp/Al composite material connection method.
To achieve the above object, the invention adopts the following technical scheme:
On the one hand, the present invention provides a kind of high-volume fractional SiCp/Al composite material connection method, the connection method packet Include step:
S1, pre-processing to connection surface to the first silicon carbide precast body；
S2, configuration connection slurry, it is described connection slurry component include carborundum aggregate, defoaming agent, inorganic binder and Organic binder；
S3, the connection slurry is coated uniformly on the first silicon carbide precast body to connection surface, rapidly by the Two silicon carbide precast bodies compress the first silicon carbide precast body of coating connection slurry to connection surface, solidify under pressure condition；
S4, by after solidification the first silicon carbide precast body and the second silicon carbide precast body aoxidized, working process；
S5, on the basis of oxidation, the first silicon carbide precast body and the second silicon carbide precast body after working process, utilize liquid Phase method prepares high-volume fractional SiCp/Al composite material, realizes the connection of high-volume fractional SiCp/Al composite material.
Preferably, the particle size range of the first silicon carbide precast body and the second silicon carbide precast body be 0.3~ 60um；In the first silicon carbide precast body and the second silicon carbide precast body the volume fraction of silicon carbide be 50%~ 75%.
Preferably, the particle size range of the carborundum aggregate is 0.3um~60um, the gradation of the carborundum aggregate and institute It is identical with the second silicon carbide precast body to state the first silicon carbide precast body.
Preferably, in the connection slurry, the weight ratio of the carborundum aggregate and the inorganic binder (1:1)~ In (4:1) range；The quality of the organic binder is the 0.5%~1.5% of the inorganic binder mass fraction；The nothing The ratio between additional amount of machine binder and the defoaming agent is 400g/ml~800g/ml.
Preferably, the defoaming agent is water-soluble defoaming agent；The inorganic binder is in silica solution or waterglass It is at least one；The organic binder is water-soluble high-molecular compound binder.
Preferably, the preparation method of the first silicon carbide precast body and the second silicon carbide precast body is selected from molding At least one of method, gel casting, injection forming or injection moulding.
Preferably, the pressure limit of pressure condition is 0.01Mpa~0.5Mpa in the step S3；Cured temperature range Be 20 DEG C~100 DEG C, cured time range be 1~for 24 hours.
Preferably, in the step S1, pretreatment includes carrying out to the first silicon carbide precast body to connection surface To processing is ground, keep its opposed flattened, remove impurity, cleaning is dried；The first silicon carbide in the step S4, after it will solidify Precast body and the second silicon carbide precast body are aoxidized, before working process, first removal solidification after the first silicon carbide precast body and The extra connection slurry in second silicon carbide precast body periphery.
Preferably, by the first silicon carbide precast body and the temperature range that aoxidizes of the second silicon carbide precast body after solidification It is 650~1100 DEG C.
Preferably, it includes pressure-free impregnation Process or pressure that the liquid phase method, which prepares high-volume fractional SiCp/Al composite material, Power Infiltration Technics method.
The beneficial effects of the present invention are: high-volume fractional SiCp/Al composite material connection method provided by the invention leads to It crosses and combines the preparation of high-volume fractional SiCp/Al composite material with the connection of composite material, it is specific to divide using with high volume The same or similar material of reinforcement ingredient is attached as binder in the precast body stage in number SiCp/Al composite material, Eliminate in the prior art, binder and base material composition to be connect differ greatly caused by thermal mismatching and the case where deformation, inside Stress is smaller, and the composite material being prepared keeps composite inner microstructure shape without being subjected to additional high temperature processing State avoids deformation and microstructure as caused by composite material connection procedure from changing, and combination with higher is strong Degree can guarantee subsequent mechanical processing and use demand, have in high-volume fractional SiCp/Al composite material connection area extensive Application prospect.
Detailed description of the invention
Fig. 1 is the high-volume fractional SiCp/Al composite material connection schematic diagram of the specific embodiment of the invention.
Fig. 2 is the high-volume fractional SiCp/ after the connection infiltrated in the specific embodiment of the invention by liquid phase method Al composite material schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair It is bright, but not to limit the present invention.
A kind of high-volume fractional SiCp/Al composite material connection method is provided in the specific embodiment of the invention, such as Fig. 1 and Shown in Fig. 2, specifically includes the following steps:
S1, pre-processing to connection surface to the first silicon carbide precast body 11；
The volume fraction of silicon carbide is 50%~75% in first silicon carbide precast body 11, by the first silicon carbide precast body 11 To connection surface carry out to grind processing, guarantee it is mutually smooth to connection surface, to grind processing after remove to the miscellaneous of connection surface Matter is brushed one layer of dehydrated alcohol, and is dried；Silicon carbide precast body is covered with the disconnected face of special construction with masking foil simultaneously Covering, which prevents from connecting slurry inflow in connection procedure, is wherein not easily cleaned；
S2, the close connection slurry 2 of solid content is configured according to the solid content of the first silicon carbide precast body 11, connect slurry 2 Component include carborundum aggregate identical with silicon carbide precast body partial size, gradation, defoaming agent, inorganic binder, organic adhesive Agent etc.；It connects in slurry, in (1:1)~(4:1) range, organic binder adds for carborundum aggregate and inorganic binder weight ratio Enter 0.5%~1.5% that amount is inorganic binder mass fraction, the ratio between inorganic binder and defoaming agent additional amount are 400g/ml ~800g/ml；Specifically, defoaming agent is water-soluble defoaming agent, selected from least one of n-butanol, amylalcohol etc.；Inorganic bond Agent is selected from least one of silica solution or waterglass；Organic binder is water-soluble high-molecular compound binder, selected from poly- Vinyl alcohol etc.；These components are uniformly mixed, the slurry that viscosity is less than 3Pas is configured to, vacuumizes de-bubble；
S3, configured connection slurry 2 is coated uniformly on one piece of silicon carbide precast body (such as the first silicon carbide precast body 11 To connection surface) on, rapidly by another piece of silicon carbide precast body (such as the second silicon carbide precast body 12) joint face compress connect Slurry 2, and apply the pressure of 0.01Mpa~0.5Mpa, stressed direction is specifically applied as shown in figure 1 shown in a of direction, is in temperature Solidify 1h~for 24 hours under conditions of 20 DEG C~100 DEG C；
S4, removal connection slurry and masking foil protective layer that the precast body surface after solidification is extra, will be interconnected First silicon carbide precast body 11 and the second silicon carbide precast body 12 are put into Muffle furnace, under the conditions of 650 DEG C~1100 DEG C of temperature It is aoxidized；Final shape required for precast body after oxidation is processed as and size；
S5, on the basis of oxidation, the first silicon carbide precast body 11 and the second silicon carbide precast body 12 after working process, benefit High-volume fractional SiCp/Al composite material is prepared with liquid phase method, realizes that the connection of high-volume fractional SiCp/Al composite material utilizes Silicon carbide precast body after liquid phase method infiltration connection；Specifically by the precast body after oxidation, working process at 650 DEG C~1100 DEG C 5min~900min is kept the temperature, so that the high-volume fractional SiCp/Al composite material 14 with bonding pad 13 is prepared, while real Connection between existing high-volume fractional SiCp/Al composite material 14.
Connection method of the invention, by by the company of the preparation of high-volume fractional SiCp/Al composite material and composite material It connects and combines, specifically use the material conduct same or similar with reinforcement ingredient in high-volume fractional SiCp/Al composite material Binder is attached in the precast body stage, is eliminated in the prior art, binder differs greatly with base material composition to be connect and produced The case where raw thermal mismatching and deformation, internal stress is smaller, and the composite material being prepared is without being subjected to additional high temperature processing, Composite inner microstructure state is kept, the deformation as caused by composite material connection procedure and microstructure is avoided to send out Changing, and bond strength with higher can guarantee subsequent mechanical processing and use demand, in high-volume fractional SiCp/ Al composite material connection area is with a wide range of applications.
It is described in detail below in conjunction with specific embodiment.
Embodiment 1
Step 1: two pieces are prepared using Gel-casting process, silicon carbide body fraction is 60%, having a size of 200 × 200 ×50mm3Silicon carbide precast body wait for 200 × 200mm of connection surface2To processing is ground, guarantees that joint face is mutually smooth, processed to grinding After remove surface impurity, and with brushing one layer of dehydrated alcohol, and dry；
Step 2: configure the close connection slurry of solid content according to the solid content of silicon carbide precast body, ingredient include with The identical silicon carbide abrasive 600g of silicon carbide precast body partial size is as carborundum aggregate, 1ml n-butanol as defoaming agent, 40% silicon PVA, as organic binder, is dissolved completely in silica solution with hot bath first as inorganic binder, 4gPVA by colloidal sol 400g It in solution, is gradually added carborundum aggregate and is dispersed with stirring uniformly, ball obtains after mixing 3h with certain viscosity slurry, vacuumizes and removes Bubble；
It handles Step 3: configured binding paste is coated uniformly on one of step 1 of passing through with scraper wait connect On silicon carbide precast body, another piece of silicon carbide precast body joint face is compressed into connection slurry rapidly, and apply 0.05MPa pressure, Solidify 5h under temperature 50 C environment；
Step 4: precast body is put into Muffle furnace 650 DEG C by the extra connection slurry of precast body surface after solidification by removal Oxidation；Precast body after oxidation carries out 160 × 160mm of processing2Depth 10mm square groove is for holding aluminium alloy to be infiltrated；
Step 5: 600min is kept the temperature at 900 DEG C using pressure-free impregnation technique, to prepare high-volume fractional SiCp/Al Composite material, while realizing the connection of high-volume fractional SiCp/Al composite material.
Embodiment 2
High-volume fractional SiCp/Al composite material connection method:
Step 1: use mould pressing process to prepare silicon carbide body fraction as 55% for two pieces, having a size of 50 × 100 × 60mm3Silicon carbide precast body joint face 50 × 100mm of surface2To grinding, guarantee that joint face is mutually smooth, to removing surface after grinding Impurity and with brush one layer of dehydrated alcohol, and dry simultaneously using masking foil covering be ready to use in infiltration aluminium alloy surface as guarantor Sheath；
Step 2: configure the close connection slurry of solid content according to the solid content of silicon carbide precast body, ingredient include with The identical silicon carbide abrasive 200g of silicon carbide precast body partial size is as aggregate, 0.5ml n-butanol as defoaming agent, 30% silica solution 200g is as inorganic binder, first in silicon sol solution, is gradually added carborundum aggregate and is dispersed with stirring uniformly, ball mixes 2h Obtaining afterwards has certain viscosity slurry, vacuumizes de-bubble；
It handles Step 3: configured binding paste is coated uniformly on one of step 1 of passing through with scraper wait connect On silicon carbide precast body, another piece of silicon carbide precast body joint face is compressed into connection slurry rapidly, and apply 0.02MPa pressure, Solidify 10h under temperature 70 C environment；
Step 4: precast body is put the extra connection slurry of the precast body surface after solidification and masking foil protective layer by removal Enter 1100 DEG C of oxidations in Muffle furnace；
Step 5: the precast body after oxidation is put into special pressure infiltration mold and is preheating to 550 DEG C, by the aluminium after fusing Alloy is poured into mold, and mold is then pressurized to 50MPa, pressure maintaining 5min, demolding after cooling benefit, to prepare high volume Score SiCp/Al composite material, while realizing the connection of high-volume fractional SiCp/Al composite material.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis Any other various changes and modifications made by technical concept of the invention should be included in the guarantor of the claims in the present invention It protects in range.

Claims (8)

1. a kind of high-volume fractional SiCp/Al composite material connection method, which is characterized in that the connection method comprising steps of
S1, pre-processing to connection surface to the first silicon carbide precast body；
S2, configuration connection slurry, the component of the connection slurry includes carborundum aggregate, defoaming agent, inorganic binder and organic Binder；The carborundum aggregate and the weight ratio of the inorganic binder are in (1:1)~(4:1) range；It is described organic viscous The quality for tying agent is the 0.5%~1.5% of the inorganic binder mass fraction；The inorganic binder and the defoaming agent The ratio between additional amount is 400g/ml~800g/ml；
S3, by it is described connection slurry be coated uniformly on the first silicon carbide precast body to connection surface, rapidly by the second carbon SiClx precast body compress the first silicon carbide precast body of coating connection slurry to connection surface, solidify under pressure condition；
S4, by after solidification the first silicon carbide precast body and the second silicon carbide precast body aoxidized, working process；
S5, on the basis of oxidation, the first silicon carbide precast body and the second silicon carbide precast body after working process, utilize liquid phase method High-volume fractional SiCp/Al composite material is prepared, realizes the connection of high-volume fractional SiCp/Al composite material；
In the step S1, pretreatment includes make to processing is ground to connection surface to the first silicon carbide precast body Its is opposed flattened, removes impurity, and cleaning is dried；The first silicon carbide precast body and second in the step S4, after it will solidify Silicon carbide precast body is aoxidized, before working process, and the first silicon carbide precast body and the second silicon carbide are pre- after first removal solidification The extra connection slurry in body periphery processed.
2. connection method as described in claim 1, which is characterized in that the first silicon carbide precast body and second carbonization The particle size range of silicon precast body is 0.3um~60um；The first silicon carbide precast body and the second silicon carbide precast body The volume fraction of middle silicon carbide is 50%~75%.
3. connection method as described in claim 1, which is characterized in that the defoaming agent is water-soluble defoaming agent；It is described inorganic Binder is selected from least one of silica solution or waterglass；The organic binder is water-soluble high-molecular compound bonding Agent.
4. connection method as described in claim 1, which is characterized in that the particle size range of the carborundum aggregate be 0.3um~ 60um, the gradation of the carborundum aggregate are identical as the first silicon carbide precast body and the second silicon carbide precast body.
5. connection method as described in claim 1, which is characterized in that the first silicon carbide precast body and second carbonization The preparation method of silicon precast body is selected from least one of die pressing, gel casting, injection forming or injection moulding.
6. connection method as described in claim 1, which is characterized in that the pressure limit of pressure condition is in the step S3 0.01Mpa~0.5Mpa；Cured temperature range is 20 DEG C~100 DEG C, and cured time range is 1h~for 24 hours.
7. connection method as described in claim 1, which is characterized in that by the first silicon carbide precast body and the second carbon after solidification The temperature range that SiClx precast body is aoxidized is 650 DEG C~1100 DEG C.
8. connection method as described in claim 1, which is characterized in that it is multiple that the liquid phase method prepares high-volume fractional SiCp/Al Condensation material includes pressure-free impregnation Process or Pressure Infiltration Process.
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