载流条件下C／C-Cu复合材料的摩擦磨损行为.pdfVIP

学兔兔 第 l4卷第6期 粉末冶金材料科学与工程 2009年12月 VbI_14No 6 Materials Science and Engineering of Powder Metallurgy Dec，2009 载流条件下C／C．Cu复合材料的摩擦磨损行为 廖亚平，易茂中，杨 琳 f中南大学 粉末冶金国家重点实验室，长沙 410083) 摘 要：采用真空无压熔渗工艺制备炭纤维整体织物炭／炭一铜(c／c—Cu)复合材料，在改装的 QDM150型干式摩 擦性能试验机上进行载流条件下的干滑动模拟实验，研究电流及紫铜对偶盘转速对C／C—Cu复合材料摩擦磨损性 能的影响规律。利用扫描电镜观察分析磨损表面及磨屑形貌。结果表明：C／C—Cu复合材料的摩擦因数随电流增大 而减小，质量磨损率随电流增大而增大，接触表面的化学反应使得正极的磨损大于负极；复合材料的摩擦因数和 磨损率均随着转速增大而降低。扫描电镜观察分析发现正极生成的磨屑主要以片状剥落层的形式存在，而负极的 磨屑细小松散，呈等轴状。 关键词：C／C—Cu复合材料；电流强度；摩擦磨损 中图分类号：TB332；U465．6 文献标识码：A 文章编号：1673—0224(2009)6—385—06 Tribological behaviors of C／C—Cu composites carrying electric current LIAO Ya-ping，YI Mao—zhong，YANG Lin (State Key Laboratory ofPowder Metallurgy，Central South University，Changsha 410083，China) Abstract：C／C—Cu composites were fabricated by infiltrating molten Cu alloy into C／C preforms．Under normal temperature，the moulded dry sliding friction and wear experiments were carried out on a refitted QDM 1 50 tribometer under different electric currents and rotation speed of coupled copper disc．The worn surface morphologies of the composite specimens were analyzed by scanning electron microscopy．The results show that the friction coefficient of the C／C—Cu composites specimens decreases and wear rate increases with the increasing of electric current，and the wear of anode is larger than that of cathode，which may attribute to the chemical reaction on the interface；The friction coefficient and the wear rate both decrease with the increasing of the coupled—copper-disc’S rota