The binder phase of NiFeCoCr medium entropy alloy (MEA) dispersed in W–Mo heavy tungsten alloy synthesized by secondary ball milling was studied. The results show that the MEA binder phase with a single FCC solid solution structure was obtained after the pre-milling process. A considerable reduction of Cr content in the MEA binder phase encourages the dissolution of Cr into the tungsten matrix and forms the Cr-rich oxides after the sintering process. TEM investigations show that the Cr-rich oxide has been indexed as the (Cr, Fe)O₃ and the twinned structure was observed in the FCC MEA binder phase. Besides, as the sintering temperature was increased to 1450 °C, liquid phase sintering is dominant in the model alloys, leading to a decrease in the hardness of the model alloys.

研究了分散在二次球磨合成的 W-Mo 重钨合金中的 NiFeCoCr 中熵合金 (MEA) 的粘结相。结果表明，经过预研磨后得到具有单一FCC固溶体结构的MEA粘结相。MEA 粘结相中 Cr 含量的显着降低促进了 Cr 溶解到钨基体中，并在烧结过程后形成了富含 Cr 的氧化物。TEM 研究表明，富含 Cr 的氧化物已被标记为 (Cr, Fe)O ₃并且在 FCC MEA 粘结相中观察到孪晶结构。此外，随着烧结温度升高到 1450 °C，液相烧结在模型合金中占主导地位，导致模型合金的硬度下降。