Abstract High-entropy alloys (HEAs) that have revolutionized the alloy design of strength-ductility trade-off, provide a pathway for the development of high strength solid-lubricating composites. Herein, a high performance AlCoCrFeNi HEA based composite reinforced with different contents of solid lubricant Ag was prepared by Spark Plasma Sintering technique. The composites retain the structure of nano-coupling network matrix and uniformly disperse Ag particles located at the grain boundaries, thereby exhibiting high strength of above 1917 MPa. Meanwhile, Ag particles render the composites excellent lubricity and significantly reduce the adhesion and wear of the frictional interface at temperature from room temperature to 800 °C in vacuum.

中文翻译：

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AlCoCrFeNi高熵合金基固体润滑复合材料的显微组织、力学和真空高温摩擦学性能

摘要 高熵合金 (HEAs) 彻底改变了强度-延展性权衡的合金设计，为开发高强度固体润滑复合材料提供了途径。在此，采用火花等离子烧结技术制备了不同含量的固体润滑剂 Ag 增强的高性能 AlCoCrFeNi HEA 基复合材料。该复合材料保留了纳米耦合网络基体的结构，并在晶界处均匀分散了Ag颗粒，从而表现出1917 MPa以上的高强度。同时，银颗粒赋予复合材料优异的润滑性，并在室温至 800°C 的真空温度下显着降低摩擦界面的粘附和磨损。