【摘要】 以气雾化法制备的AlCo_0.4CrFeNi_2.7高熵合金粉末和碳化钨（WC）分别作为粘结相和硬质相，采用放电等离子烧结制备高熵硬质合金，研究了粘结相含量和烧结温度对硬质合金的微观结构和力学性能的影响。结果表明，粘结相占比为10%（质量分数）经1 300℃烧结的高熵硬质合金具有最佳力学性能，硬度和断裂韧性分别为1 575HV₃₀、9.2 MPa·m^1/2。相对于粘结相含量对合金性能的影响，烧结温度的影响效果更显著；两者分别通过影响WC晶粒大小、相对密度以及有害的脆性金属间化合物的生成来影响高熵硬质合金的力学性能。更多还原

【Abstract】 AlCo_0.4CrFeNi_2.7 high entropy alloy（HEA） powder prepared by gas atomization and tungsten carbide（WC） was used as binder phase and hard phase, respectively, and high-entropy cemented carbide was prepared by spark plasma sintering. The effects of binder phase content and sintering temperature on the microstructure and mechanical properties of cemented carbide were studied. The results show that the high-entropy cemented carbide with a binder phase ratio of 10wt% and sintered at 1 300 ℃ has the best mechanical properties, the hardness and fracture toughness are 1 575HV₃₀ and 9.2 MPa·m^1/2, respectively. Compare to the influence of the binder phase content on performance, the effect of sintering temperature on performance is more significant. They affect the mechanical properties of high-entropy cemented carbide by influencing the grain size, relative density and production of harmful brittle intermetallic compounds of tungsten carbide, respectively.更多还原