High volume fraction silicon carbide particle reinforced aluminum matrix composite material and its preparation method

A technology of aluminum matrix composite material and silicon carbide particles, which is applied in the field of high volume fraction silicon carbide particle reinforced aluminum matrix composite material and its preparation, and the powder metallurgy preparation technology field of high volume fraction SiCp reinforced aluminum matrix composite material, which can solve the problem of difficult to achieve and other problems, to achieve the effect of low thermal conductivity, high elastic modulus, excellent mechanical and physical properties

Active Publication Date: 2017-11-14
有研金属复材技术有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The composite material prepared by this patent goes through the steps of alloy powder granulation, adding binder, pressing, sintering, etc., and obtains an aluminum matrix composite material with good performance. However, if the powder metallurgy process removes the binder improperly, it will affect the material performance. , In addition, the powder metallurgy process is also difficult to achieve to a certain extent for the shape requirements of large-scale and thin-walled optical-mechanical structural parts
The hot isostatic pressing preparation process in powder metallurgy has gained great attention in recent years, which can achieve large-scale, high-performance, high-density SiC p Strengthen the preparation of aluminum matrix composites, but the current patents and literature reports that this process is more common in low-volume (15-25vol.%) SiC p / Al-based composite materials, for large-size, thin-walled, high-volume (such as 55-60vol.%) SiC for optical-mechanical structural parts of optical remote sensors p Powder metallurgy hot isostatic pressing preparation of reinforced aluminum matrix composites has not been reported

Method used

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  • High volume fraction silicon carbide particle reinforced aluminum matrix composite material and its preparation method
  • High volume fraction silicon carbide particle reinforced aluminum matrix composite material and its preparation method
  • High volume fraction silicon carbide particle reinforced aluminum matrix composite material and its preparation method

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preparation example Construction

[0031] figure 1 For the preparation process roadmap of the present invention, SiC p Perform surface drying treatment, and then dry the SiC p Powder mixed with Si powder, Al powder and Cu powder by ball milling - cold isostatic pressing (rubber jacket, size 1200mm×900mm×100mm) - vacuum degassing (aluminum jacket) - hot isostatic pressing sintering - mechanical processing (such as diamond tools) - Ultrasonic non-destructive testing, and finally get a large size SiC p Reinforced Al-based composites.

[0032] In the following examples, the Al powder used may be gas-atomized aluminum powder, the Cu powder may be electrolytic copper powder, and the Si powder may be ordinary silicon powder. SiC p The drying process is carried out in a box-type incubator, the drying temperature is 120-180°C, and the holding time is 12-24 hours.

Embodiment 1

[0034] The volume fraction of the composite material is: SiC p The reinforcing phase content is 55vol.%, and the Al-Cu-Si matrix content is 45vol.%. SiC p The particle size is 20-40 μm, the particle size of Al powder is 15-20 μm, the particle size of Cu powder is 5-10 μm, and the particle size of Si powder is 5-10 μm. SiC p The reinforcement is dried, and the matrix powder with the nominal composition of Al-3.5Cu-5Si (wt%) is configured, and then 140Kg of 55vol.% SiC p Mix powder with 45vol.% Al-3.5Cu-5Si for ball milling, ball mill speed 150 rpm, ball milling time 16h, ball-to-material ratio 5:1, dry blend; sieve the mixed powder and put it into cold water Static pressure rubber sheath (the sheath size is 1200mm×900mm×100mm), the metal rod is used to guide the powder and then the cold isostatic pressing is formed, the cold isostatic pressing pressure is 200MPa, and the pressing time is 30min; Vacuum degassing isostatically pressed ingot, and the vacuum degree is required ...

Embodiment 2

[0038] The volume fraction of the composite material is: SiC p The reinforcing phase content is 55vol.%, and the Al-Cu-Si matrix content is 45vol.%. SiC p The particle size of Al powder is 20-40 μm, the particle size of Al powder is 15-20 μm, the particle size of Cu powder is 5-10 μm, and the particle size of Si powder is 5-10 μm. First dry the SiC p Reinforcement body, and configure the matrix powder whose nominal composition is Al-4.5Cu-5Si, and then add 140Kg of 55vol.% SiC p Mix with 45vol.% Al-4.5Cu-5Si powder by ball milling, the speed of the ball mill is 150 rpm, the ball milling time is 16h, the ball-to-material ratio is 5:1, and dry-mix; Statically press the rubber sheath (the sheath size is 1200mm×900mm×100mm), and then carry out cold isostatic pressing molding, the cold isostatic pressing pressure is 200MPa, and the pressing time is 30min; Vacuum degassing, the vacuum degree is required to be less than 10 at the end of vacuum degassing -3 Pa; the vacuum degasse...

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Abstract

The invention relates to a high-volume-fraction silicon carbide particle-reinforced aluminum-based composite material and a preparation method thereof, belonging to the field of new material research and development. The material is composed of silicon carbide particle reinforcement phase and aluminum alloy matrix, the volume fraction of silicon carbide particles is 55-60vol.%, the aluminum alloy matrix is ​​40-45vol.%, and the aluminum alloy matrix is ​​Al-Cu-Si alloy. The invention adopts the powder metallurgy process to prepare the composite material, and obtains the aluminum-based composite material with large size, thin wall, high elastic modulus, high bending strength, low thermal expansion coefficient, low thermal conductivity, high compactness and comprehensive performance, and the composite material The overall size is 900mm×700mm×60mm. The excellent comprehensive performance of this material can better meet the requirements of the optical-mechanical structural parts of aerospace optical remote sensors.

Description

technical field [0001] The present invention relates to a kind of high volume fraction silicon carbide particle (SiC p ) reinforced aluminum matrix composite material and preparation method thereof, in particular to a high volume SiC p The powder metallurgy preparation process of reinforced aluminum-based composite materials, the prepared composite materials can be applied to the optical-mechanical structural parts of aerospace optical remote sensors, which belongs to the field of new material research and development. technical background [0002] Particle-reinforced aluminum matrix composites have played an important role in high-tech fields such as space technology, high-speed transportation, and electronic components due to their remarkable performance advantages, and are typical high-tech new materials. SiC p It is the most widely used strengthening phase in particle reinforced aluminum matrix composites, which is due to the fact that SiC p It has excellent comprehen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C21/14C22C32/00
Inventor 聂俊辉樊建中张少明魏少华左涛马自力
Owner 有研金属复材技术有限公司
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