SiO_(2)与ZrO_(2)组元对铜基摩擦材料与C/C-SiC复合材料配副摩擦磨损性能的影响  

Effects of SiO_(2) and ZrO_(2) on friction and wear properties of copper-based friction materials mated with C/C-SiC composites

作　　者：李陈鑫 刘如铁[1] 林雪杨 陈洁[1] 熊翔[1] 廖宁 LI Chenxin;LIU Rutie;LIN Xueyang;CHEN Jie;XIONG Xiang;LIAO Ning(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

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》2023年第1期44-54,共11页Materials Science and Engineering of Powder Metallurgy

基　　金：国家国际科技合作项目(2015DFR50580)。

摘　　要：在粉末冶金铜基摩擦材料中分别添加SiO_(2)和ZrO_(2),研究SiO_(2)和ZrO_(2)对粉末冶金铜基摩擦材料与C/C-SiC复合材料配副时摩擦磨损性能的影响,并分析两者影响机制的内在关联。结果表明,含SiO_(2)或ZrO_(2)的铜基摩擦材料与C/C-SiC复合材料配副时,能在高制动速度下保持较高的平均摩擦因数,分别为0.3758和0.3424,摩擦材料的磨损量较低,为1.44μm/次和0.95μm/次,配副材料几乎无磨损。SiO_(2)在制动过程中易脱落,形成磨粒,对摩擦材料与配副材料表面造成磨粒磨损,而ZrO_(2)在基体中保持完整,以硬质微凸体的形式对C/C-SiC复合材料摩擦表面产生犁削作用。SiO_(2)在高制动速度下破碎脱落后易嵌入C/C-SiC复合材料表面摩擦膜,有利于以Cu及Cu的化合物为主的磨屑在其周围积累,促进摩擦转移膜在C/C-SiC复合材料摩擦表面的形成,从而改善材料的摩擦磨损性能。SiO_(2)and ZrO_(2)were added to powder metallurgy Cu-based friction materials respectively.The effects of SiO_(2)and ZrO_(2)on the friction and wear properties of powder metallurgy Cu-based friction materials mated with C/C-SiC composites were studied,and the internal relationship between their influence mechanisms was analyzed.The results show that the Cu-based friction materials containing Si O_(2)or ZrO_(2)can achieve high average friction coefficient(0.3758 and 0.3424 respectively)at high braking speeds when they is mated with C/C-SiC composites.The wear of the friction materials are very low,which is 1.44μm/time and 0.95μm/time respectively,and the C/C-SiC composites has almost no wear.During the braking process,Si O_(2)is easy to fall off and form abrasive particles,causing abrasive wear on the two friction surfaces.However,Zr O_(2)remains intact in the matrix,which mainly ploughs the friction surface of C/C-SiC composites in the form of hard micro bumps.SiO_(2)is easily embedded in the friction film of C/C-SiC composites after breaking and falling off at high braking speed,which is conducive to the accumulation of wear debris mainly composed of Cu and Cu compounds around it,and promotes the formation of friction transfer film on the friction surface of C/C-SiC composites to improve the friction and wear properties of the materials.

关 键 词：铜基摩擦材料 C/C-SIC复合材料 摩擦磨损 SiO_(2) ZrO_(2) 

分 类 号：TB333[一般工业技术—材料科学与工程]