Effect of La Content on Tribological Behavior of Cu/Ti3SiC2/C/MWCNTs/Graphene/La Nanocomposites

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

稀有金属材料与工程 Pub Date : 2018-08-01 DOI:10.1016/S1875-5372(18)30182-6

Shao Zhenyi , Jiang Xiaosong , Zhang Meimei , Zhu Degui , Ding Yichao , Wang Jing

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引用次数: 1

Abstract

Cu/Ti₃SiC₂/C/MWCNTs/Graphene/La nanocomposites were fabricated by vacuum hot-pressing sintering and hot isostatic pressing. Effect of lanthanum (La) content on tribological behavior of Cu/Ti₃SiC₂/C/MWCNTs/Graphene/La nanocomposites against GCr15 was evaluated using a wear and abrasion tester. In addition, influence of La content, normal force and rotational speed on tribological behavior of the nanocomposite was investigated to analyze their interaction mechanism. The mutual influence of La content, normal force and rotational speed was analyzed by orthogonality analysis, variance analysis and range analysis. The morphologies of worn surfaces have been observed and analyzed by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). Results demonstrate that La content plays an exclusively significant role in the friction and wear performance of the Cu/Ti₃SiC₂/C/MWCNTs/Graphene/La nanocomposites. The wear mechanism of the nanocomposites with 0.05 wt% La is abrasive wear, delamination wear and oxidation wear. And wear mechanism of the nanocomposites with 0.1 wt% and 0.3 wt% La is adhesive wear and oxidation wear.

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La含量对Cu/Ti3SiC2/C/MWCNTs/石墨烯/La纳米复合材料摩擦学行为的影响

采用真空热压烧结和热等静压法制备了Cu/Ti3SiC2/C/MWCNTs/石墨烯/La纳米复合材料。采用磨损试验机研究了镧含量对Cu/Ti3SiC2/C/MWCNTs/石墨烯/La纳米复合材料抗GCr15摩擦性能的影响。此外，研究了La含量、法向力和转速对纳米复合材料摩擦学行为的影响，分析了它们的相互作用机理。通过正交分析、方差分析和极差分析，分析了La含量、法向力和转速的相互影响。利用扫描电子显微镜(SEM)和能谱仪(EDS)对磨损表面的形貌进行了观察和分析。结果表明，La含量对Cu/Ti3SiC2/C/MWCNTs/石墨烯/La纳米复合材料的摩擦磨损性能有显著影响。0.05 wt% La纳米复合材料的磨损机制为磨粒磨损、脱层磨损和氧化磨损。添加0.1 wt% La和0.3 wt% La的纳米复合材料的磨损机制为粘结磨损和氧化磨损。

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