不同试验模式下C/C-Cu复合材料的摩擦磨损特性  

Tribological characteristic of C/C-Cu composites under variable testing mode

作　　者：杨琳[1] 易茂中[1] 冉丽萍[1] 廖亚平[1] 李文军[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2010年第3期241-245,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展(973)计划资助项目(2006CB600906);湖南省重点科技支撑计划资助项目(2007KG2017)

摘　　要：采用无压熔渗工艺制备1种新型的具有自润滑耐磨性能的炭纤维整体织物/炭-铜(C/C-Cu)复合材料,分别在环-块运动模式、销-盘运动模式和往复运动模式下对该材料的摩擦磨损特性进行研究,并与粉末冶金方法制备的滑板用C/Cu复合材料进行性能比较。结果表明:C/C-Cu复合材料在不同试验模式下表现出迥异的摩擦磨损特性。往复运动模式下试样表面形成完整光滑的磨屑层,摩擦因数和磨损量均分别维持在0.02和1.70 mm3的较低水平,摩擦磨损性能优于C/Cu复合材料;环-块模式下试样磨损面粗糙,摩擦因数最高,达到0.25以上,磨损量最低,仅为0.75 mm3与C/Cu复合材料的摩擦磨损性能相当;销-盘模式下试样的磨损量远高于其它2种摩擦模式,最高达55 mm3,摩擦磨损性能比C/Cu复合材料差。C/C-Cu composites were fabricated by infiltrating molten Cu alloy into C/C preforms.The tribological characteristic of the composites was studied using the block-on-ring,pin-on-disk and reciprocating arrangements,and compared with C/Cu composites prepared by traditional powder metallurgy process.It is found that the tribological behavior of C/C-Cu composites has widely different characteristic at the different testing mode.As for reciprocating mode,a continuous debris layer is formed on the surface of C/C-Cu composites,the friction coefficient with 0.02 and wear volume with 1.70 mm3 are maintained at a low level.In the block-on-ring mode,the friction coefficient reaches the maximum value of 0.25caused by a rough surface,while the wear volume reaches the minimum value of 0.75 mm3.The wear volume of C/C-Cu composites under pin-on-disk mode is much higher than that of other two testing modes.C/C-Cu composites show better tribological properties than C/Cu composites in reciprocating mode,while C/Cu composites are superior in pin-on-disk mode.Tribological properties of the two composites are close in block-on-ring mode.

关 键 词：C/C-CU复合材料 熔渗 摩擦磨损特性 试验模式 

分 类 号：TB331[一般工业技术—材料科学与工程]