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Method of preparing SiCp/Al composite material with complicated shape and high volume percent ratio

A technology of composite materials and complex shapes, which is applied in the field of preparation of SiCp/Al composite materials with complex shapes and high volume ratios, achieving high dimensional accuracy, low cost, and good performance

Inactive Publication Date: 2007-08-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a complex shape high volume ratio SiC p The preparation method of / Al composite material solves the problem of complex shape SiC with high volume ratio p Low-cost near-net-shape preparation technical problems of / Al composites

Method used

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  • Method of preparing SiCp/Al composite material with complicated shape and high volume percent ratio

Examples

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Effect test

Embodiment 1

[0017] Example 1: Preparation of SiC with a volume fraction of 50% p / Al composite parts

[0018] Using deionized water as a solvent, acrylamide (AM) as a monomer, and methylenebisacrylamide (MBAM) as a crosslinking agent, prepare a premix solution with a monomer mass fraction of 10% and a mass ratio of MBAM to AM of 1:30 . Add the powders with a particle size of 2.5 μm and 28 μm to the above-mentioned premixed solution at a mass ratio of 1:4, and simultaneously add a 1.5% powder mass fraction of tetramethylammonium hydroxide 10% (TMAH) aqueous solution as a dispersant , making SiC account for 50% of the overall integral. Use alumina as the ball milling medium, and mix in a ball mill barrel for 2 hours to obtain a uniformly dispersed SiC slurry. Add total volume 0.8% ammonium persulfate 5% aqueous solution (ASP) and 0.08% tetramethylethylenediamine (TEMED) as catalyst in above-mentioned slurry, inject in the non-porous plastic mould, put into Keep warm for 40 minutes in an...

Embodiment 2

[0019] Example 2: Preparation of SiC with a volume fraction of 60% p / Al composite parts

[0020] Using water as solvent, acrylamide (AM) as monomer, and methylenebisacrylamide (MBAM) as crosslinking agent, prepare a premix solution with a monomer mass fraction of 15% and a mass ratio of MBAM to AM of 1:70. Powders with a particle size of 7 μm and 63 μm were added to the above premixed solution at a mass ratio of 1:2, and a 10% aqueous solution of tetramethylammonium hydroxide (TMAH) with a powder mass fraction of 2.0% was added as a dispersant, and ball milled For 4 hours, stir evenly to obtain a uniformly dispersed SiC slurry, stir and add 0.6% ammonium persulfate 5% aqueous solution (ASP) and 0.06%‰ tetramethylethylenediamine (TEMED ) as a catalyst, stir well and pour into a non-porous plastic mold, put it into a 60°C high-humidity incubator and keep warm for 40 minutes, and continue to keep warm for 5 hours after demoulding. Speed ​​up drying until the quality no longer ...

Embodiment 3

[0021] Example 3: Preparation of SiC with a volume fraction of 70% p / Al composite parts

[0022] Using deionized water as a solvent, acrylamide (AM) as a monomer, and methylenebisacrylamide (MBAM) as a crosslinking agent, prepare a premix solution with a monomer mass fraction of 20% and a mass ratio of MBAM to AM of 1:120 , the powders with particle sizes of 0.8 μm, 7 μm and 63 μm were added to the above premixed solution at a mass ratio of 1:2:4, so that the volume of SiC accounted for 70% of the total volume, and the powder mass fraction was added at the same time 2.8% Tetramethylammonium hydroxide 10% (TMAH) aqueous solution was used as a dispersant, ball milled for 6 hours, stirred evenly to obtain a uniformly dispersed SiC suspension, and a 5% aqueous solution of ammonium persulfate with a slurry volume fraction of 0.4% was added to the above suspension (ASP) and 0.04% tetramethylethylenediamine (TEMED) are used as catalysts, stirred evenly and poured into a non-porous ...

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Abstract

The invention discloses a preparing method of SiCp / Al composite with complete shape and high analytic in metal base composite material researching domain, which comprises the following steps: allocating pre-mixing liquid with monomer, cross linker and disperser; adding into SiC powder; balling; getting stable suspension with SiC volume content at 50-70%; adding into trigger and activator; stirring evenly; injecting into unapertured mold; solidifying and shaping in incubator with temperature at 50-70 deg.c; getting green compact; drying; discharging glue; presintering; getting SiC bone; placing Al alloy of 4-8% Mg, 6-12% Si on the adaptive position of bone; putting into heater; heating-up at 900-1200 deg.c under the protection of inert gas; inflating high pure nitrogen; keeping the temperature at 1-6 h; cooling; getting the product. This invention possesses the merit of cheap cost.

Description

technical field [0001] The invention belongs to the research field of metal matrix composite materials, and in particular provides a SiC with complex shape and high volume ratio p / Al composite preparation method. Background technique [0002] High volume fraction (50-70%) SiC p / Al composite material combines the excellent properties of metal aluminum and SiC, and has excellent physical and mechanical properties, such as high elastic modulus, high specific strength, good thermal conductivity, etc., and is widely used in electronic packaging, aerospace and other fields. It has a wide range of application prospects, and it has always been one of the hottest topics in the field of metal matrix composites research in terms of theory and practical application. A large number of preparation methods have emerged, such as casting, spray deposition, powder metallurgy, etc. However, these methods generally have the disadvantages of high cost, uneven material structure, poor perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00B22D23/04C22C29/06
Inventor 何新波曲选辉马强任淑彬
Owner UNIV OF SCI & TECH BEIJING
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