【摘要】 采用熔盐电解混合氧化物直接固相脱氧制备CoCrFeNi高熵合金，并对稀土元素钇（Y）掺杂对CoCrFeNi高熵合金的物相、组织及力学性能的影响进行了系统研究。结果表明，可通过电解混合金属氧化物直接固相脱氧制备CoCrFeNi高熵合金，Y元素掺杂可直接以Y₂O₃的形态与主体氧化物混合后脱氧并实现元素掺杂，但该工艺制备过程会形成一定量Cr₇C₃相。适量Y掺杂可有效提升CoCrFeNi高熵合金的力学性能，当Y添加量达到5%后，高熵合金的显微硬度（HV）为399，比未添加Y的CoCrFeNi高熵合金的硬度提升了58.3%。当Y添加量为1%时CoCrFeNi高熵合金的抗拉强度提升10.7%，断裂伸长率增加了5倍。更多还原

【Abstract】 High-entropy alloys of CoCrFeNi had been prepared by electrolysis process using the mixed oxides as the raw materials, and the effects of rare earth element of Yttrium doping on the phase, microstructure and mechanical properties of CoCrFeNi high-entropy alloys were also studied. The results show that CoCrFeNi high-entropy alloy can be directly prepared by electrolysis from the mixed oxides of CoO, Cr₂O₃, NiO, Fe₂O₃, and Y doping can be directly mixed with the main oxide in the form of Y₂O₃ and deoxidized to achieve Y doping. The second phase of Cr₇C₃ appears in CoCrFeNi high-entropy alloy when using electrolysis process. The appropriate amount of Y can effectively improve the mechanical properties of CoCrFeNi high-entropy alloy. When the addition amount of Y reaches 5%, the hardness of the high-entropy alloy is 399 HV, which is 58.3% higher than that of the CoCrFeNi high-entropy alloy without Y addition. When the addition of Y is 1%, the tensile strength of CoCrFeNi high-entropy alloy increases by 10.7 % and the elongation increases by 5 times.更多还原