Mechanical properties and wear resistance of medium entropy Fe40Mn40Cr10Co10/TiC composites

Fe40Mn40Cr10Co10/TiC中熵合金复合材料的力学和摩擦磨损性能（英文）

The Fe40Mn40Cr10Co10/TiC (volume fraction of TiC, 10%) composites were synthesized in combination of ball milling and spark plasma sintering (SPS) in the present work. Mechanical properties and wear resistance of the Fe40Mn40Cr10Co10/TiC composites were individually investigated. It was found that TiC particles homogenously distributed in the Fe40Mn40Cr10Co10/TiC composite after being sintered at 1373 K for 15 min. Meanwhile, grain refinement was observed in the as-sintered composite. Compared with the pure Fe40Mn40Cr10Co10 medium entropy alloy (MEA) matrix grain, addition of 10% TiC particles resulted in an increase in the compressive strength from 1.571 to 2.174 GPa, and the hardness from HV 320 to HV 872. Wear resistance results demonstrated that the friction coefficient, wear depth and width of the composite decreased in comparison with the Fe40Mn40Cr10Co10 MEA matrix. Excellent mechanical properties and wear resistance could offer the Fe40Mn40Cr10Co10/TiC composite a very promising candidate for engineering applications.

采用机械球磨和放电等离子烧结方法制备Fe40Mn40Cr10Co10/TiC (TiC 的体积分数为10%)中熵合金复合材料,并对其力学和摩擦磨损性能进行研究。研究表明,在1373 K 烧结15 min 后,TiC 颗粒均匀分布在Fe40Mn40Cr10Co10/TiC 复合材料中,烧结后复合材料的晶粒得到明显细化;同时,添加10% TiC 颗粒使复合材料的抗压强度从1.571 GPa 提高至2.174 GPa ,维氏硬度从HV 320 提高至HV 872 。摩擦磨损试验表明,与Fe40Mn40Cr10Co10 中熵合金基体相比,复合材料的摩擦因数、磨痕深度和宽度都减小。良好的力学性能和摩擦磨损性能使Fe40Mn40Cr10Co10/TiC 复合材料成为工程应用的理想材料。