HIGH-ENTROPY ALLOY BORIDE CERAMIC, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

摘要

A high-entropy alloy boride ceramic and a preparation method therefor. The molecular formula of the high-entropy alloy boride ceramic is Aly(FeNiCoCr)1-x-yBx, wherein 0≤x≤1 and 0≤y≤1.The high-entropy alloy boride is prepared by the following steps: carrying out ball milling on Al, Fe, Ni, Co, Cr, and B to prepare Aly(FeNiCoCr)1-x-yBx powder; then carrying out spark plasma sintering at a heating rate of 50-200 °C/min, a temperature of 800-1500 °C, and a constant pressure of 10-50 Mpa; carrying out furnace cooling. The Aly(FeNiCoCr)1-x-yBx high-entropy alloy boride powder prepared by the method is approximately spherical and is small in particle size, the ceramic main phase is an FCC solid solution in which Fe and Cr metal borides are dispersed, and high density, high hardness and wear resistance are achieved.