C/C-SiC复合材料摩擦磨损性能的研究

STUDY OF FRICTION AND WEAR PROPERTIES OF C/C-SiC COMPOSITES

以不同孔隙率的C/C复合材料为预制体,聚碳硅烷为先驱体,二甲苯为溶液,将聚碳硅烷和二甲苯按一定质量比配成浸渍液,采用真空加压浸渍裂解法制备出了一系列C/C-SiC复合材料,并且对材料的摩擦磨损性能进行了研究.结果表明,随着预制体密度的增大,材料的平均摩擦系数、摩擦力矩都随之增加,而刹车时间、刹停温度和线磨损则随之降低.静力矩测试表明,材料有比较高的静摩擦系数,几组试样中预制体原始密度为1.47 g.cm-3的材料较适合作为刹车材料使用.

A series of C/C-SiC composites have been produced by immersion and pyrolysis method in the condition of vacuum and additive pressure using different porosity carbon-carbon composites as perform, a certain mass percent of maceration extract using polycarbosilane as pre-ceramic and xylene as solution. The friction and wear properties of materials have been studied by friction test. The effect of different initial density and ingredient content on friction and wear properties was analyzed in detail. The result shows that, with the increasing of the perform density, the average friction coefficient , friction moment increases while the braking time, braking temperature and linear wear decrease. Friction and wear properties of C/C-SiC composites relate close-knit to initial density of perform. The sample whose perform initial density is 1.47 g · cm^-3 is suitable for braking materials.