( 中南大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 在M-2000型摩擦磨损实验机上， 对3种C/C复合材料与40Cr钢配副分别在干态、 水润滑、 油润滑3种条件下的摩擦磨损行为进行了研究。 结果表明：在3种润滑条件下， 干态摩擦试样的摩擦系数最大，体积磨损最小； 基体炭为树脂浸渍炭的试样在3种试样摩擦系数最高，约为0.141~0.205； 水润滑时试样的摩擦系数最小，为0.05~0.10， 但体积磨损最大，最高可达7.75mm3；油润滑时试样的摩擦系数和体积磨损均介于干态和水润滑之间； 干摩擦时， 试样的摩擦系数随着载荷增加而缓慢降低， 水润滑和油润滑的摩擦系数则随着载荷的增加而先增加后减少；干态摩擦时材料表面形成了完整的摩擦膜， 水润滑和油润滑条件下摩擦膜很薄且不完整； 所有润滑条件下试样均以磨粒磨损或犁削磨损为主。
关键字: C/C复合材料; 润滑; 摩擦磨损
tribology properties of C/C composites
（ State Key Laboratory of Powder Metallurgy,
Central South University, Changsha 410083, China）
Abstract: Using M-2000 tribology machine, under non-lubrication, water-lubrication and oil-lubrication test situation, the tribology properties of three kinds of C/C composites were studied with the 40Cr steel as couple part. The results show that among the three kinds of test situation, the samples tested under non-lubrication situation own the highest friction coefficient and the least bulk worn loss under the same loading, and among the three kinds of composites tested under the non-lubrication test situation, the resin carbon matrix sample exhibits the highest friction coefficient that is between 0.141 and 0.205. The samples friction coefficient under water-lubrication test situation is the least that is between 0.05 and 0.10, but their bulk worn loss is the highest that can be 7.75mm3 under 150N loading. Both friction coefficient and bulk worn loss of the samples under oil-lubrication test situation are the midst. The samples friction coefficient under non-lubrication test situation decreases slowly with increasing load, while those of the samples under water-lubrication or oil-lubrication test situation increase at first but decrease at last. SEM shows that the integrity friction film is only formed on the non-lubrication tested sample. The wear mechanism under all test situations is abrasion wear and plough wear.
Key words: C/C composites; lubrication; tribology
