Nano and submicron aluminum oxide mixing enhanced copper-base composite material and preparation method thereof

Abstract

The invention discloses a nano- and sub-micron aluminum oxide hybrid reinforced copper matrix composite material and a preparation method thereof. The metallic copper contains nano-alumina particles with a size and a volume fraction of 10-50 nm and 0.5-2.5% respectively, and the size and The volume fractions are respectively 0.1-0.9 μm and 5-10% of submicron alumina particles. The preparation method is to mix Cu-0.5wt% Al alloy powder and CuO powder, oxidize it into a prefabricated block after vacuum heating, and preheat it. After mixing the Al powder and CuO powder, they are added to the copper liquid to react in situ to form submicron alumina particles. Under vacuum and pressure, the copper liquid is infiltrated into the porous prefabricated block and formed after solidification. The strength, electrical conductivity, plasticity and other comprehensive properties of the material of the present invention are superior to traditional single-size reinforced materials, realizing near-net shape of complex shapes and large-sized parts, low cost, improved comprehensive properties of materials, and improved efficiency.

Description

technical field [0001] The invention relates to a composite material, especially a metal matrix composite material. Background technique [0002] Alumina particle-reinforced copper-based composite materials have excellent comprehensive properties such as high strength and high conductivity, so they can replace copper alloys for electrical contacts, integrated circuit lead frames, microwave tube structures, resistance welding electrodes, and continuous casting steel crystallizers , high-strength power lines and other fields. The aluminum oxide particle-reinforced copper-based composite materials developed at home and abroad are either nano-alumina particle-reinforced copper-based composite materials or micron-alumina particle-reinforced copper-based composite materials. Nano-alumina particle-reinforced copper-based composite materials are the most effective The preparation method is the internal oxidation method. The material performance obtained by this method is the highes...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the comprehensive properties of the two existing composite materials are not high, the present invention proposes a nano- and sub-micron alumina hybrid reinforced copper-based composite material, which has low preparation cost, convenient process, and can realize complex shapes and large-sized near Net shape, good overall performance, high reliability