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Abstract：
The fretting wear behaviors of silicone rubber under dry friction and different lubrication conditions are studied experimentally. Water, engine oil, dimethyl silicone oil (DSO), and dimethyl silicone oil doped with graphene oxide (DSO/GO) are selected as lubricants. Under the liquid lubrication conditions, the silicone rubber samples are always immersed in the same volume of lubricant. The contact model of a 440C steel ball and silicone rubber sample is the sphere-on-flat contact. The reciprocating fretting wear experiments are carried out using the reciprocating friction wear tester. A scanning electron microscope and three-dimensional white-light interference profilometer are used to detect the surface wear morphology and obtain the wear volume, respectively. The influences of normal force, lubrication condition, and displacement amplitude on fretting wear behavior are discussed. The fretting wear performances of silicone rubber under different fretting states and lubrication conditions are compared. The results show that for a small normal force, silicone rubber has the best wear resistance under DSO/GO lubrication. While for a large normal force, silicone rubber has the best wear resistance under engine oil lubrication.
摘要：
实验研究了硅橡胶在干摩擦和不同润滑条件下的微动磨损行为。水,机油,二甲基硅油(DSO),选择掺杂有氧化石墨烯的二甲基硅油(DSO/GO)作为润滑剂。在液体润滑条件下，硅橡胶样品总是浸入相同体积的润滑剂中。440C钢球和硅橡胶样品的接触模型是球在平面上的接触。利用往复摩擦磨损试验机进行了往复微动磨损实验。利用扫描电子显微镜和三维白光干涉轮廓仪检测表面磨损形貌,获得磨损量,分别。法向力的影响，润滑条件,讨论了位移幅值对微动磨损行为的影响。比较了硅橡胶在不同微动状态和润滑条件下的微动磨损性能。结果表明,对于较小的法向力,硅橡胶在DSO/GO润滑下具有最佳的耐磨性。而对于一个大的法向力，硅橡胶在机油润滑下具有最佳的耐磨性。
