C/ C坯体对 C/ C2Cu复合材料摩擦磨损行为的影响

采用无压熔渗方法制备炭纤维整体织物/炭2铜 (C/ C2Cu) 复合材料 , 在 MM22000型环2块摩擦磨损试验机上考察复合材料的摩擦磨损性能 , 利用扫描电子显微镜观察分析磨损表面形貌 , 研究 C/ C坯体对材料的摩擦磨损行为的影响及机制。结果表明 : 随着 C/ C坯体密度的增加 , 摩擦系数及 C/ C2Cu材料自身和对偶的磨损量均降低 ; 采用浸渍/炭化 ( I/ C) 坯体的 C/ C2Cu材料摩擦系数及自身和对偶件的磨损量均高于采用化学气相渗透(CVI) 坯体的试样; 摩擦面平行于纤维取向的试样摩擦系数低于垂直于纤维取向的试样 , 但磨损率较高。

Effect of C/C preform on the triboiogical behavior of C/C-Cu composites

C/ C2 Cu composites were fabricated by molten Cu alloy infilt ration into C/ C preforms prepared by chemical vapor infilt ration or impregnation/ carbonization. The t ribological behavior of the composite block with the Cu ring counterpart was evaluated using an MM22000 f riction and wear tester. The worn surface morphologies of the composite blocks and the Cu rings were analyzed by means of scanning elect ron microscopy. The influence of the C/ C preform on the t ribological behavior of the composites was investigated. The result s show that the f riction coefficient , wear rate of the composites and the mass loss of Cu rings decrease with the increasing of density of the preforms ; the f riction coefficient and wear rate of the composite with impregnation/ carbonization preform is higher than those with chemical vapor infilt ration preform; the wear rate of the composites with parallel orientation is higher than that with vertical orientation , while the formers riction coefficient is lower .