( 中南大學 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 在M-2000型摩擦磨損實驗機上， 對3種C/C復合材料與40Cr鋼配副分別在干態(tài)、 水潤滑、 油潤滑3種條件下的摩擦磨損行為進行了研究。 結果表明：在3種潤滑條件下， 干態(tài)摩擦試樣的摩擦系數(shù)最大，體積磨損最小； 基體炭為樹脂浸漬炭的試樣在3種試樣摩擦系數(shù)最高，約為0.141~0.205； 水潤滑時試樣的摩擦系數(shù)最小，為0.05~0.10， 但體積磨損最大，最高可達7.75mm3；油潤滑時試樣的摩擦系數(shù)和體積磨損均介于干態(tài)和水潤滑之間； 干摩擦時， 試樣的摩擦系數(shù)隨著載荷增加而緩慢降低， 水潤滑和油潤滑的摩擦系數(shù)則隨著載荷的增加而先增加后減少；干態(tài)摩擦時材料表面形成了完整的摩擦膜， 水潤滑和油潤滑條件下摩擦膜很薄且不完整； 所有潤滑條件下試樣均以磨粒磨損或犁削磨損為主。
關鍵字: C/C復合材料; 潤滑; 摩擦磨損
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
