Short fiber-particle synergetically-reinforced copper-based composite material and preparation method thereof

A technology of copper-based composite materials and short fibers, which is applied in the field of copper-based composite materials, and can solve the problems of material system composition design that needs to be optimized and preparation methods that are not mature enough.

Inactive Publication Date: 2013-03-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the immature preparation method, the main reason is that the composition design of the material system needs to be optimized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A copper-based composite material synergistically reinforced by short fibers and particles: copper powder (dendritic electrolytic copper powder, purchased from Beijing General Research Institute of Nonferrous Metals, purity>99.8%, particle size -325 mesh), short fibers using carbon nanotubes ( The outer diameter of the tube wall is 20-30 nm, the length is 20-30 μm, the purity is >95%), the addition amount is 0.5wt.%, and the particles are made of alumina (purchased from Beijing Nachen Technology, the particle size is 20 nm, the purity is >99.9%) The addition amount is 3.5wt.%. The powder mixing process is magnetic stirring (MS) process and ultrasonic dispersion. The sintering method is spark plasma sintering (SPS) process, which is directly formed during sintering. The process parameters: the thickness of powder sintering is 5mm, For a sample with a diameter of Φ20mm, the sintering pressure and temperature are 40MPa and 850°C respectively, and the heat preservation is 5m...

Embodiment 2

[0025] A copper-based composite material synergistically reinforced by short fibers and particles: copper powder (dendritic electrolytic copper powder, purchased from Beijing General Research Institute of Nonferrous Metals, purity>99.8%, particle size -325 mesh), nano-carbon fiber (purchased from Beijing De Kedao Technology Co., Ltd., diameter 150-200 nm, length 10-30 nm, purity >95%) added at 0.3wt.%, particles made of aluminum nitride (purchased from Qinhuangdao Yinuo New Material Co., Ltd., particle size 3μm, Purity>99.9%), the addition amount is 2.5wt.%, the powder mixing process is high-energy ball mill dispersion, the sintering method is hot isostatic pressing process, direct powder forming, the powder is packed into the bag, and then nitrogen and argon are used for pressurization Medium, the powder is directly heated and pressurized for sintering. The process parameters are: sintering pressure and temperature are 300MPa and 700°C respectively, and the properties are: den...

Embodiment 3

[0028] A copper-based composite material synergistically reinforced by short fibers and particles: copper powder (dendritic electrolytic copper powder, purchased from Beijing General Research Institute of Nonferrous Metals, purity >99.8%, particle size -325 mesh), SiC whiskers (purchased from Qinhuangdao Yinuo High-tech Material Development Co., Ltd. (purity >99%)) is added in an amount of 0.1wt.%, and the particles are made of tungsten carbide (purchased from Beijing Mengtai Research Technology Development Center, purity >99.9%, 300 mesh). The amount added is 1.5wt. .%, the powder mixing process is magnetic stirring (MS) process and ultrasonic dispersion, forming and sintering are integrated, the sintering method is hot pressing sintering process, and the process parameters are: sintering pressure is 0.1MPa, sintering at 900 ° C for 2 hours, and the properties are: Density 98.8%, hardness 80.35N / mm2 , Conductivity 5.1×10 7 Ω -1 m -1 , The thermal conductivity is 210.5W / mk, ...

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Abstract

The invention relates to a copper-based composite material, and particularly relates to a short fiber-particle synergetically-reinforced copper-based composite material which is prepared through powder metallurgy. Short fibers and particles are used as reinforced phases, the content of the short fiber is 0.1-0.1 wt%, and the content of reinforcement particles is 0.1-10 wt%. The short fibers can be carbon nanotubes, carbon nanofibers, ceramic short fibers, and the like, and the particles used as reinforced phases can be aluminum oxide, zirconium oxide, magnesium oxide, titanium dioxide, silicon carbide, titanium carbide, tungsten carbide, silicon nitride, aluminum nitride, titanium nitride, titanium diboride, Ti3SiC2, and the like. The composite material is prepared through the steps of mixing, forming, sintering and processing, and the room temperature and the high temperature strength of the composite material can be increased by more than 3 times in comparison with those of pure copper; the electrical conductivity of the composite material can reach more than 80% of that of pure copper; the thermal conductivity of the composite material can reach more than 70% of that of pure copper; the coefficient of friction of the composite material can be reduced to be below 70% of that of pure copper; and the wear rate of the composite material can be reduced to be below 50% of that of pure copper.

Description

technical field [0001] The invention relates to a copper-based composite material, in particular to a copper-based composite material prepared by powder metallurgy and synergistically reinforced by short fibers and particles. [0002] Background technique [0003] Due to its unique performance advantages, discontinuum reinforced metal matrix composites have been used in many fields such as aerospace and automobile. Among the preparation methods of composite materials, the powder metallurgy method is widely used due to its unique advantages. There have been many studies on particle reinforced copper matrix composites and short fiber reinforced copper matrix composites. For example, the literature "Preparation and Research of Carbon Nanotube Reinforced Copper Matrix Composites (Wang Sen, Master Thesis, Lanzhou University, 2009)" and "Nano Al 2 o 3 Particle-reinforced new copper-based self-lubricating composite materials (Chen Suiyuan, Liu Yijie, Liu Changsheng, Sun Guifang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C47/14C22C49/02C22C1/05
Inventor 贾成厂崔照雯蒋立坤高鹏常宇宏曾石轩李泽洲颜翃李敬仁
Owner UNIV OF SCI & TECH BEIJING
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