Refractory high-entropy alloys are a new type of alloy exhibiting good properties at high temperatures. In this study, Al_xCrTiMo refractory high-entropy alloys were prepared by spark plasma sintering, and the mechanical and tribological properties of the alloys were investigated. The three-dimensional morphology and SEM image of the worn surface showed variation of wear marks, wherein the wear rate of the alloy decreased with increasing temperature, and the main wear mechanism changed from abrasive to adhesive wear. The results of Raman and x-ray diffraction spectroscopies of the phase structure of the oxidized glazed layer on the wear marks showed that the oxide layer on the surface of the Al_0.25CrTiMo wear mark at 800°C contained oxides of MoO₃ and MoO₂. It can be concluded from these results that reduction of the aluminum content of the alloy will promote the formation of Cr and Mo oxides, which is important in the development of high-temperature wear resistance of Al_xCrTiMo alloys.

难熔高熵合金是一种在高温下表现出良好性能的新型合金。本研究采用放电等离子烧结法制备了Al _x CrTiMo 难熔高熵合金，并研究了合金的力学和摩擦学性能。磨损表面的三维形貌和SEM图像显示出磨损痕迹的变化，其中合金的磨损率随温度升高而降低，主要磨损机制由磨粒磨损转变为粘着磨损。磨痕上氧化釉层相结构的拉曼和X射线衍射光谱结果表明，800℃下Al _0.25 CrTiMo磨痕表面的氧化层含有MoO ₃和MoO的氧化物₂ . 从这些结果可以得出结论，合金中铝含量的降低将促进Cr和Mo氧化物的形成，这对Al _x CrTiMo合金高温耐磨性的发展具有重要意义。