The effect of graphene content and sliding speed on the wear mechanism of nickel-graphene nanocomposites
The effect of graphene content and sliding speed on the wear mechanism of nickel-graphene nanocomposites
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DOI：
10.1016/j.apsusc.2015.10.139
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发表时间：
2015-12-30
影响因子：
6.7
通讯作者：
Alp, A.
中科院分区：
文献类型：
--
作者：
Algul, H.;Tokur, M.;Alp, A.
采用脉冲电沉积技术在瓦特型电解液中制备了镍-石墨烯金属基复合镀层。详细研究了电解液中石墨烯浓度对纳米复合镀层的微观结构、显微硬度、摩擦学性能的影响。采用维氏显微硬度计测量了复合涂层的显微硬度。通过扫描电子显微镜（SEM）对样品的表面进行表征。采用拉曼光谱、能谱仪和X射线衍射仪分析了复合镀层的化学成分和结构。在恒定载荷和不同滑动速度条件下，采用往复式球盘摩擦磨损试验机对复合涂层的摩擦学性能进行了测试，测定了复合涂层的磨损量和摩擦系数。在CSM仪器上对电沉积的镍石墨烯纳米复合材料涂层相对于M50钢球滑动的磨损和摩擦变化进行了研究。在室温下，在环境空气中，在没有任何润滑的情况下，检查涂层的摩擦和磨损性能。还全面研究了通过改变石墨烯纳米片含量来改变磨损机制。(C)2015 Elsevier B. V.版权所有。
Nickel-graphene metal matrix composite coatings were fabricated by pulse electrodeposition technique from a Watt's type electrolyte. Effect of the graphene concentration in the electrolyte on the microstructure, microhardness, tribological features of nanocomposite coatings were evaluated in details. Microhardness of the composite coating was measured using a Vicker's microhardness indenter. The surfaces of the samples were characterized by scanning electron microscopy (SEM). Raman spectroscopy, EDS and XRD analysis were used to determine chemical composition and structure of composite coatings. The tribological behavior of the resultant composite coating was tested by a reciprocating ball-on disk method at constant load but varying sliding speeds for determination the wear loss and friction coefficient features against a counterface. The wear and friction variations of the electrodeposited nickel graphene nanocomposite coatings sliding against an M50 steel balls were carried out on a CSM Instrument. The friction and wear properties of the coatings were examined without any lubrication at room temperature in the ambient air. The change in wear mechanisms by changing graphene nanosheets content was also comprehensively studied. (C) 2015 Elsevier B.V. All rights reserved.