炭化工艺对C/C-SiC制动材料摩擦磨损性能的影响  

Effect of carbonization on friction and wear properties of C/C-SiC braking materials

作　　者：杨阳[1] 熊翔[1] 肖鹏[1] 旷文敏[1] 姜四洲[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》2007年第4期249-253,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：湖南省杰出青年科学基金资助项目(06JJ10007)

摘　　要：以短炭纤维、Si粉、炭粉和树脂为原料,通过均匀混合、温压成形,在1 500℃原位反应最终制得C/C-SiC复合材料。测试试样的开孔隙率、热扩散率及摩擦磨损性能,研究制备工艺过程中后续炭化对摩擦磨损性能的影响,并对摩擦表面及磨屑进行扫描电镜观察和X射线衍射分析。结果表明:采用树脂浸渍炭化工艺制备的C/C-SiC制动材料具有适中的摩擦因数和较低的磨损率;经后续炭化,树脂转变为树脂炭,以磨粒的形式增大摩擦力,同时有效地降低了磨损率。C/C-SiC composites were manufactured by mixing short carbon fiber, silicon powder, carbon powder, and resin, followed by warm compacting and finally in-situ reacting at 1 500℃. The open porosity, thermal diffusivity and friction property of the samples were tested, and the effect of carbonization on friction and wear behaviors of C/C-SiC composites were studied. The friction surfaces and wear debris were analyzed by SEM and X-Ray. The results show that C/C-SiC composites prepared by resin impregnation and carbonization process have moderate friction coefficient and lower wear rate; After carbonization, the resin transforms to resin carbon, which increase the friction coefficient acting as wear debris particles, and simultaneously decrease the wear rate of material.

关 键 词：C/C—SiC复合材料 温压 原位反应 摩擦磨损 

分 类 号：TP332[自动化与计算机技术—计算机系统结构]