论文部分内容阅读
以针刺炭纤维整体毡为预制体,采用呋喃树脂加压浸渍、加压固化和炭化制得密度为1.45g/cm3的多孔体C/C材料,然后熔融渗硅制得密度为2.37g/cm3的炭纤维增强双基体炭/碳化硅(C/C-SiC)材料.结果表明:熔融渗硅中反应生成的SiC基体主要分布在胎网层、针刺纤维附近以及无纬布层的纤维束间;C/C-SiC材料的弯曲强度为165MPa,垂直和平行于无纬布铺层方向的压缩强度分别为210和196MPa;C/C-SiC材料的摩擦性能稳定,平均动摩擦系数为0.38,静摩擦系数为0.40,和对偶件的线磨损率分别为5.3和3.7μm/(面.次),其磨损过程是由磨粒磨损、黏着磨损和氧化磨损共同作用的结果.
The acicular carbon fiber monolithic felt was used as a preform, and the porous C / C material with a density of 1.45g / cm3 was prepared by pressure impregnation, compression curing and carbonization of furan resin, then melted and infiltrated with silicon to obtain a density of 2.37g / cm3 carbon fiber reinforced dual-matrix carbon / silicon carbide (C / C-SiC) material.The results show that the SiC matrix formed by the reaction in the melt infiltration silicon is mainly distributed in the fiber layer The flexural strength of C / C-SiC material is 165MPa, the compressive strength of the C / C-SiC material is 210 and 196MPa respectively in the direction perpendicular to and parallel to the non-woven fabric ply. The frictional properties of C / C-SiC material are stable with the average dynamic friction coefficient of 0.38 , The coefficient of static friction is 0.40, and the wear rate of the couple is 5.3 and 3.7μm / (surface. Times) respectively. The wear process is the result of abrasive wear, adhesive wear and oxidative wear.