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Silicon carbide and silicon particle reinforced aluminum-copper based composite material and preparation method thereof

A composite material, silicon carbide technology, applied in the field of particle reinforced metal matrix composites, can solve problems such as difficult machining, and achieve the effect of controllable thermal expansion coefficient and uniform structure

Active Publication Date: 2016-07-27
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the silicon carbide volume is above 25%, subsequent machining is more difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Using Al-0.5%wt.%Cu composition ratio (that is, the mass ratio of aluminum to copper is 995:5), after casting, the powder is atomized on the gas atomization equipment to make powder, the atomization temperature is 580 °C, and the atomization gas is High-purity argon, sieved to obtain -600 mesh atomized powder. The average particle size of silicon carbide is 9 μm, the average particle size of silicon particles is 24 μm, and the aspect ratio of both particles is less than 5. The ratio of silicon carbide, silicon particles and atomized powder is 1:2:1, that is, the weight percentages of the three phases of silicon carbide, silicon particles and atomized powder are 25%, 50% and 25% respectively. The three powders were mixed on a spherical mixer for 12 hours according to the ball-to-material ratio of 5:1, and the mixed powder after mixing was sieved and loaded into In the rubber sheath, cold isostatic pressing is carried out. The pressure of cold isostatic pressing is 85M...

Embodiment 2

[0054] Using Al-4.5%wt.%Cu composition ratio (that is, the mass ratio of aluminum and copper is 955:45), after casting, the powder is atomized on the gas atomization equipment to make powder, the atomization temperature is 650 °C, and the atomization gas is High-purity argon, sieved to obtain -900 mesh atomized powder. The silicon carbide has an average particle size of 3.5 μm, and the silicon particles have an average particle size of 15 μm. The ratio of silicon carbide, silicon particles and atomized powder is 3:9:8, that is, the weight percentages of the three phases of silicon carbide, silicon particles and atomized powder are 15%, 45% and 40% respectively. The three powders were mixed on a spherical mixer for 26 hours according to the ball-to-material ratio of 3:1, and the mixed powder after mixing was sieved and loaded into the In the rubber sheath, cold isostatic pressing is carried out. The pressure of cold isostatic pressing is 210MPa, and the holding time is 10min...

Embodiment 3

[0057] Using Al-6.0%wt.%Cu composition ratio (that is, the mass ratio of aluminum and copper is 940:60), after casting, the powder is atomized on the gas atomization equipment to make powder, the atomization temperature is 650 °C, and the atomization gas is High-purity argon, sieved to obtain -700 mesh atomized powder. The silicon carbide has an average particle size of 5 μm, and the silicon particles have an average particle size of 19 μm. The ratio of silicon carbide, silicon particles and atomized powder is 8:19:13, that is, the weight percentages of the three phases of silicon carbide, silicon particles and atomized powder are 20%, 47.5% and 32.5% respectively. The three powders were mixed on a spherical mixer for 43 hours according to the ball-to-material ratio of 7:1, and the mixed powder after mixing was sieved and loaded into In the rubber sheath, cold isostatic pressing is carried out. The pressure of cold isostatic pressing is 110MPa, and the holding time is 27min...

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Abstract

The invention relates to a silicon carbide and silicon particle reinforced aluminum-copper based composite material and a preparation method thereof, and belongs to the field of the particle reinforced metal based composite material. The composite material is composed of the components by the weight percentage: 15-25 wt.% of silicon carbide, 45-50 wt.% of silicon and 25-40wt.% of an aluminum-copper alloy; the silicon carbide and silicon particles as a reinforcement phase are uniformly distributed in the aluminum-copper alloy matrix, and the aluminum-copper alloy matrix forms a three-dimensional reticular structure. A powder metallurgy method is used for preparation. The obtained aluminum based composite material has uniform structure, is fully dense, has the comprehensive performance of light weight, low expansion, high modulus, high strength, resistance to space radiation environment, easy processing and the like, is suitable for use in space environments, and can be used as related component materials in the aviation and aerospace fields.

Description

technical field [0001] The invention relates to an aluminum-copper-based composite material reinforced by silicon carbide and silicon particles and a preparation method thereof. The composite material which uses silicon carbide and silicon particles as a reinforcing phase and an aluminum-copper alloy as a matrix has the advantages of light weight, low expansion, and high modulus. The characteristics of high volume and high strength are especially suitable for use in space environments, and belong to the field of particle-reinforced metal matrix composites. Background technique [0002] With the continuous development of aerospace technology, the complex service environment in the aerospace field has put forward more and more stringent requirements on the comprehensive properties of materials such as density, thermal expansion coefficient, modulus, and strength. In recent years, metal matrix composites have relatively good application prospects in the fields of aviation, aero...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C32/00C22C1/05
Inventor 郝心想樊建中马自力刘彦强肖雪婷赵月红魏少华左涛
Owner 有研金属复材技术有限公司
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