Phase evolution, microstructures, mechanical properties and tribological performance of the Si doped Al_0.2Co_1.5CrFeNi_1.5Ti_0.5 high entropy alloys (HEAs) were investigated and compared with conventional wear-resistant alloy Stelite-6. The addition of the Si promoted the formation of the silicide (Ti₅Si₃ and TiSi) in FCC-structured HEAs. The interstitial solid solution strengthening of the Si and the second phase strengthening of the silicide increased the hardness of the HEAs, but reduced compressive strength and fracture toughness. Si doped HEAs showed excellent tribological performance as the friction coefficient decreased monotonously with increasing temperature and Si content. The wear resistance was proportional to compressive strength and fracture toughness. At 800 °C, the wear resistance of the HEAs was about 17 times higher than that of Stelite-6, which was attributed to the good mechanical properties and nano oxide glaze layer on the worn surface.

研究了掺Si的Al _0.2 Co _1.5 CrFeNi _1.5 Ti _0.5高熵合金（HEAs）的相变，组织，力学性能和摩擦学性能，并将其与常规耐磨合金Stelite-6进行了比较。Si的添加促进了硅化物（Ti ₅ Si ₃和TiSi）在FCC结构的HEA中。Si的间隙固溶强化和硅化物的第二相强化提高了HEA的硬度，但降低了抗压强度和断裂韧性。掺Si的HEA表现出优异的摩擦学性能，因为摩擦系数随温度和Si含量的增加而单调降低。耐磨性与抗压强度和断裂韧性成正比。在800°C时，HEA的耐磨性比Stelite-6高约17倍，这归因于良好的机械性能和磨损表面上的纳米氧化物釉层。