Tribological behavior of WC-Al2O3-graphene composite at different temperatures

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-10-02 DOI:10.1080/19475411.2022.2138625

Xiaoxiao Zhang, Xiaoxian Sun, Yifei Wang, Jiayu Qin

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Abstract

ABSTRACT WC-Al2O3-graphene composite powder was synthesized by ultrasonic treatment and ball milling, then consolidated by hot pressing sintering (HPS). For potential applications, the friction coefficient and wear resistance of the sintered bulks at different temperatures (room temperature, 200, 400, and 600°C) were investigated. The wear tracks were characterized by scanning electron microscope, energy dispersive spectroscopy and Raman spectroscopy, X-ray photoelectron spectroscopy, respectively. The results show that the friction coefficient decreases and the wear rate increases with the increase of temperature, mainly because oxidization wear occurs on the wear surface of WC-Al2O3-graphene composite under high temperature. The main wear mechanism is the destruction and formation of tribochemical compacted layer. Graphene reduces the wear rate of WC-Al2O3-graphene composite under high tampere. The reason is that graphene reduces oxidation wear by blocking or absorbing oxygen; moreover, graphene reduces the cycle frequency of damage and reconstruction of tribochemical compacted layer by reducing the peeling of it. GRAPHICAL ABSTRACT

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wc - al2o3 -石墨烯复合材料在不同温度下的摩擦学行为

采用超声处理和球磨法制备wc - al2o3 -石墨烯复合粉体，然后采用热压烧结(HPS)进行固结。研究了烧结体在不同温度(室温、200、400和600℃)下的摩擦系数和耐磨性。分别用扫描电镜、能量色散光谱和拉曼光谱、x射线光电子能谱对磨损痕迹进行表征。结果表明:随着温度的升高，wc - al2o3 -石墨烯复合材料的摩擦系数减小，磨损速率增大，这主要是因为高温下wc - al2o3 -石墨烯复合材料磨损表面发生氧化磨损;磨损的主要机理是摩擦化学压实层的破坏和形成。石墨烯降低了wc - al2o3 -石墨烯复合材料在高温下的磨损率。原因是石墨烯通过阻隔或吸收氧气来减少氧化磨损;此外，石墨烯通过减少摩擦化学压实层的剥离，降低了摩擦化学压实层损伤和重建的循环频率。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.