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

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...