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通过粉末冶金法制备了AlCoCrFeNi/Cu-10 mass%Sn复合材料，分别研究了室温和高温下AlCoCrFeNi高熵合金含量对复合材料摩擦磨损性能的影响，并分析了室温下复合材料的磨损机理。结果表明：不含AlCoCrFeNi高熵合金的复合材料的摩擦系数、磨损率均较大，磨痕表面凹坑较深，犁沟行程短且宽，磨损机理以粘着磨损为主；随着AlCoCrFeNi高熵合金含量增加，复合材料摩擦系数和磨损率先减小后增大，磨痕表面凹坑变浅，犁沟变得长且窄；当AlCoCrFeNi高熵合金的含量为30 mass%时，复合材料具有较大的摩擦系数(0.35)、最小的磨损率(0.408 mm3·N-1·m-1),此时磨损性能达到最佳，磨损机理由粘着磨损向疲劳磨损转变，当AlCoCrFeNi高熵合金的含量为40 mass%时，转变为轻微磨粒磨损。在100～400℃高温下，随着温度的升高，高熵合金含量为30 mass%的复合材料的摩擦系数和磨损率波动最小，摩擦系数稳定在0.35～0.47之间，磨损率在0.11～0.13 mm3·N-1·m-1之间，具备最佳的高温磨损性能。
Abstract：AlCoCrFeNi/Cu-10 mass%Sn composites were prepared by powder metallurgy method. The effects of AlCoCrFeNi high entropy alloy content on friction and wear properties of the composites at room temperature and high temperature were investigated, and the wear mechanism of the composites at room temperature was analyzed. The results show that the friction coefficient and wear rate of the composites without AlCoCrFeNi high entropy alloy are larger, the pits on the surface of the wear scar are deep, the furrow stroke is short and wide, and the wear mechanism is mainly adhesive wear. With the increase of AlCoCrFeNi high entropy alloy content, the friction coefficient and the wear rate of the composites first decrease and then increase, the pits on the surface of the wear scar become shallower, and the furrows become longer and narrower. When the content of AlCoCrFeNi high entropy alloy is 30 mass%, the composites have a larger friction coefficient(0.35) and a minimum wear rate(0.41 mm3·N-1·m-1), its wear performance reaches the best, and the wear mechanism changes from adhesive wear to fatigue wear. When the content of AlCoCrFeNi high entropy alloy is 40 mass%, the wear mechanism of the composites changes to slight abrasive wear. At the high temperature of 100-400 ℃, with the increase of temperature, the friction coefficient and wear rate of the composites with AlCoCrFeNi content of 30 mass% fluctuate the least, the friction coefficient is stable between 0.35-0.47, and the wear rate is between 0.11-0.13 mm3·N-1·m-1, which has the best high temperature wear performance.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2022-0030
中图分类号:TB331
引用信息:
[1]宋之锴,吴浩宇,龙威等.AlCoCrFeNi高熵合金含量对Cu-10 mass%Sn复合材料摩擦磨损性能的影响[J],2022,43(07):28-37.DOI:10.13289/j.issn.1009-6264.2022-0030.
基金信息: