【作者】 高雯； 唐睿； 龙冲生； 张俊彦； 王纪平；

【Author】 GAO Wen~1,TANG Rui~1,LONG Chong-sheng~1,ZHANG jun-yan~(1,2),WANG ji-ping~3 (1.Nuclear Power Institut of China,Chengdu of Sichuan Prov.610041,China; 2.Lanzhou Institute of Chemical Physics Chinese Academy of Sciences,Lanzhou,730050,China; 3.Xi’an Jiaotong University,Xi’an,710049,China)

【机构】 中国核动力研究设计院； 中国科学研究院化物所固体润滑重点实验室； 西安交通大学金属材料强度国家重点实验室；

【摘要】 通过液相气化热梯度CVI法结合反应熔渗法（RMI法）制备出C/C-SiC复合材料,密度为2.17～2.38 g/cm³,并通过环块摩擦磨损实验考察了在水润滑条件下的载荷和转速对其摩擦磨损特性的影响。实验结果表明:在水润滑环块式摩擦试验中,摩擦系数和磨损量均随载荷的增加而增加,随转速的增加而减小。当载荷小于300N时,转速对C/C-SiC试样的摩擦系数和比磨损率影响较大,随转速增加,摩擦系数和比磨损率有较大减小;当转速小于1.046m/s时,摩擦系数稳定在0.12左右,而当转速为2.092 m/s,摩擦系数可达到0.01～0.02,这与水润滑膜的形成有关;当载荷为300N后,材料具有较大的摩擦系数（0.16）和磨损率(量级约10^-7mm³/Nm),且转速增加对摩擦系数影响很小;C/C-SiC试样的摩擦磨损过程以磨粒磨损和微凸体断裂磨损为主。更多还原

【Abstract】 C/C-SiC composites,prepared by a modified thermal gradient chemical vapor infiltration(preparing C/C) combined with reactive melt infiltration(infiltrating Si),were studied on the friction and wear behaviors in this paper.The results show that during block-on-ring tests under water lubrication,the friction coefficient and specific wear rate of C/C-SiC samples increase with increasing load,but decrease with increasing sliding velocity,and sliding velocity has a more influence on friction and wear behaviors than load.The C/C-SiC samples mainly subject to grain wear and fracture wear in the process of friction.更多还原