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Affiliation of Author(s):材料科学工程学院

Teaching and Research Group:材料科学工程学院

Journal:Journal of Alloys and Compounds

Funded by:省、市、自治区科技项目

Key Words:High-entropy alloy；Cu-matrix composites；Friction stir processing；Mechanical properties；Wear

Abstract:Although copper has excellent thermal conductivity, poor wear resistance seriously limits its development. In this paper, a Cu matrix surface composite material reinforced by FeCoNiCrAl high-entropy alloy particles was prepared by friction stir processing. The microstructure and properties of the composite were investigated. The results showed that both the FSP process and the addition of HEA particles contributed to the refinement of the Cu-matrix grains. A diffusion layer with a widthof about 0.8 μm was formed at the interface between the HEA particles and the Cu matrix. Compared with received Cu, the microhardness of Cu matrix in the composites was increased by 69.8%, the wear rate was re uced by 29.7%, and the wear resistance was significantly improved. Mean while, the ductility of the composite was consistent with that of the received Cu, and the thermal conductivity reached 87% of the received Cu. Therefore, this paper provided a new possibility for developing multifunctional structural materials with high wear resistance, high ductility, and high thermal conductivity.

Co-author:gongwenbiao

First Author:Liyupeng

Indexed by:Journal paper

Page Number:1

Translation or Not:no

Date of Publication:2023-02-15