The addition of refractory metals represents a promising approach for development of future high-entropy alloys (HEAs). Niobium and molybdenum are particularly suitable additives for increasing hardness as well as wear and corrosion resistance. In the context of surface protection applications, eutectic high-entropy alloys (EHEAs) with their homogeneous property profile are of specific interest. In the present work, two EHEAs were developed starting from the alloy Al_0.3CoCrFeNi using electric arc melting. Following mechanical and microstructural characterization, the two alloys were found to have the compositions Al_0.3CoCrFeNiMo_0.75 and Al_0.3CoCrFeNiNb_0.5. For thermal spray processing, powders of the above alloys were prepared by inert gas atomization. The coatings produced by high-velocity oxy-fuel spraying (HVOF) were characterized and evaluated compared with castings, allowing process–structure–property relationships to be derived. Based on the results, statements on possible application potential can be made.

添加难熔金属代表了开发未来高熵合金（HEAs）的一种有前途的方法。铌和钼是特别合适的添加剂，用于增加硬度以及耐磨性和耐腐蚀性。在表面保护应用的背景下，具有均匀性能分布的共晶高熵合金 (EHEA) 受到特别关注。在目前的工作中，使用电弧熔化从合金 Al _{0.3 CoCrFeNi 开始开发了两种 EHEA。}在进行机械和微观结构表征后，发现这两种合金的成分为 Al _0.3 CoCrFeNiMo _0.75和 Al _0.3 CoCrFeNiNb _0.5. 对于热喷涂处理，上述合金的粉末通过惰性气体雾化制备。与铸件相比，对高速氧燃料喷涂 (HVOF) 产生的涂层进行了表征和评估，从而得出工艺-结构-性能关系。根据结果​​，可以就可能的应用潜力做出陈述。