AlCoCrFeNi高熵合金的高温摩擦磨损性能
发布时间：2019-06-18 10:08
【摘要】：AlCoCrFeNi高熵合金因其优异的综合力学性能而有望成为新一代高温结构材料,但对其高温摩擦磨损性能的研究还较为少见.本文中应用放电等离子烧结(SPS)技术制备了AlCoCrFeNi高熵合金,研究了其显微组织和力学性能,系统地考察了其在室温至800℃时的摩擦磨损性能.结果表明:应用SPS技术制备的AlCoCrFeNi高熵合金主要由FCC相、无序BCC相和少量有序BCC相组成;呈网格状分布的FCC相使高熵合金具有良好的塑性和韧性,而呈等轴状分布的BCC相赋予了高熵合金优异的强度;高熵合金室温至800℃时的摩擦系数在0.43~0.51之间,磨损率低于10 5mm3/(N·m).室温至中温阶段主要为磨粒磨损,中温至高温阶段的磨损机制为磨粒磨损、黏着磨损和塑性变形综合作用.高温下高熵合金表面形成了一层主要由为Al2O3和Cr2O3组成的氧化物膜,在一定程度上起到抗磨作用.
[Abstract]:AlCoCrFeNi high entropy alloy is expected to become a new generation of high temperature structural materials because of its excellent comprehensive mechanical properties, but the study of high temperature friction and wear properties is still rare. In this paper, AlCoCrFeNi high entropy alloy was prepared by spark plasma sintering (Spark plasma sintering (SPS). Its microstructure and mechanical properties were studied, and its friction and wear properties from room temperature to 800 鈩，
本文编号：2501390
[Abstract]:AlCoCrFeNi high entropy alloy is expected to become a new generation of high temperature structural materials because of its excellent comprehensive mechanical properties, but the study of high temperature friction and wear properties is still rare. In this paper, AlCoCrFeNi high entropy alloy was prepared by spark plasma sintering (Spark plasma sintering (SPS). Its microstructure and mechanical properties were studied, and its friction and wear properties from room temperature to 800 鈩，
本文编号：2501390
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