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Reinforced aluminum-based composite material and preparation method thereof

An aluminum-based composite material and a composite material technology, which are applied in the field of reinforced aluminum-based composite materials and their preparation, can solve problems such as poor distribution uniformity, and achieve the effects of uniform distribution, improved wear resistance, and improved compactness.

Inactive Publication Date: 2018-03-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned problems existing in the prior art, the object of the present invention is to provide a kind of 3 N 4 The reinforced aluminum matrix composite material with whiskers as reinforcement and its preparation method and application can effectively solve the problem of poor distribution uniformity of ceramics in the metal matrix, realize good interface bonding of the two phases, and improve the compactness of the material. Realize the application requirements of this kind of material to make locomotive brake disc material

Method used

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  • Reinforced aluminum-based composite material and preparation method thereof
  • Reinforced aluminum-based composite material and preparation method thereof
  • Reinforced aluminum-based composite material and preparation method thereof

Examples

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Embodiment 1

[0044] First weigh 6.4g of β-Si after surface roughening 3 N 4 Whiskers and 108.8g median particle diameter are pure aluminum powder (the contained chemical element mass percent of described pure aluminum powder is: Al≥99.9%, O≤0.1%, the pure aluminum powder used in following examples 2~7 of 10 μm Same as Example 1), adding 57.6g of absolute ethanol and 230.4g of silicon nitride balls, ball milling at a speed of 250r / min for 6h to prepare a uniform and stable mixture slurry, which was dried at a constant temperature of 50°C Dry in the box for 8 hours, and sieve to obtain the powder mixture of the composite material; then, use a graphite mold to carry out hot-press sintering on the above powder mixture at 600°C, the holding time is 30 minutes, the sintering pressure is 30MPa, and the sintering atmosphere is an argon atmosphere. The composite material block is prepared, and then the above block is hot-extruded at 500°C using a hot extrusion die, with an extrusion ratio of 12:1,...

Embodiment 2

[0049] First weigh 19.2g of β-Si after surface roughening 3 N 4Whiskers and 108.8g of pure aluminum powder with a median particle size of 10 μm were added to 64g of absolute ethanol and 256g of silicon nitride balls, and ball milled at a speed of 250r / min for 6h to prepare a uniform and stable mixture slurry. It was dried in a constant temperature drying oven at 50°C for 8 hours, and sieved to obtain a powder mixture of composite materials; then, the above powder mixture was hot-pressed and sintered at 600°C using a graphite mold, the holding time was 30 minutes, and the sintering pressure was 30MPa. The sintering atmosphere is an argon atmosphere, and the composite material block is prepared, and then the above block is hot-extruded at 500°C using a hot extrusion die, and the extrusion ratio is 12:1, and finally β-Si 3 N 4 β-Si with a whisker content of 15% by volume 3 N 4 Whisker-reinforced aluminum matrix composites.

[0050] The Vickers hardness, ultimate tensile stre...

Embodiment 3

[0052] First weigh 32g of β-Si after surface roughening treatment 3 N 4 Whiskers and 108.8g of pure aluminum powder with a median particle size of 10μm were added to 70.4g of absolute ethanol and 281.6g of silicon nitride balls, and ball milled at a speed of 250r / min for 6h to prepare a uniform and stable mixture slurry , dried it in a constant temperature drying oven at 50°C for 8 hours, and sieved to obtain a powder mixture of the composite material; then, the above powder mixture was hot-pressed and sintered at 600°C using a graphite mold, the holding time was 30 minutes, and the sintering pressure was 30MPa, the sintering atmosphere is an argon atmosphere, and the composite material block is prepared, and then the above block is hot-extruded at 500°C using a hot extrusion die, with an extrusion ratio of 12:1, and finally β-Si 3 N 4 β-Si with a whisker content of 25% by volume 3 N 4 Whisker-reinforced aluminum matrix composites.

[0053] The Vickers hardness, ultimate ...

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Abstract

The invention relates to an enhanced aluminum-based composite material and a preparation method thereof. Si3N4 whiskers are used as an enhancement phase of the composite material, pure aluminum or aluminum-based alloy are used as a matrix phase of the composite material, and beta-Si3N4 whiskers are uniformly distributed in the pure aluminum or aluminum alloy matrix.

Description

technical field [0001] The invention relates to a reinforced aluminum-based composite material and a preparation method thereof, in particular to a β-Si 3 N 4 The invention discloses a reinforced aluminum matrix composite material with whiskers as reinforcements and a preparation method thereof. Background technique [0002] At present, the transportation industry is developing at a high speed, but the energy shortage problem it faces is becoming more and more severe. According to relevant reports, every 10% increase in the weight of the vehicle itself will increase its energy consumption by 5.5%. Therefore, in today's increasingly scarce resources, lightweight vehicles for the purpose of weight reduction have become an inevitable development trend. [0003] The brake disc is a key component of the automobile braking system, and its material composition will directly affect the braking effect of the vehicle. When the car is in emergency braking, the huge thermal load caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/06C22C49/14C22C47/14B22F3/14B22F3/105B22F3/20C22C101/18
CPCC22C49/06B22F3/105B22F3/14B22F3/20B22F2003/1051B22F2003/208B22F2998/10C22C47/14C22C49/14B22F2009/043
Inventor 曾宇平张晨旭尹金伟左开慧姚冬旭夏咏锋梁汉琴
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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