摘要
通过化学气相渗透法(CVI)结合反应熔体浸渗法(RMI)制备了低成本、高性能的C／SiC飞机摩擦材料,并模拟飞机正常着陆条件进行了摩擦磨损实验．实验结果表明: C／SiC是比C／C更优的飞机摩擦材料,具有动、静摩擦系数高(分别为0．34、0．41),湿态几乎无衰减(约2．9％),磨损小(约1．9μm／次),摩擦性能稳定等特点．并采用金相显微镜、扫描电镜等对C／SiC摩擦材料的摩擦面以及磨屑形貌进行了观察,并对其磨损机理进行了探索．结果表明,磨损机理以磨粒磨损为主,同时由于垂直于摩擦面的纤维柬增强了其层间抗剪切能力,从而提高了其抗磨损性能．
The cost effective and high performance carbon/silicon carbide aircraft friction materials were prepared by the combination of chemical vapor infiltration （CVI） and reactive melt infiltration （RMI）. The tribological properties of the as-manufactured C/SiC composites were mensured under the simulated conditions of normal landing of the aircraft. The test results indicate the more excellent tribological properties of C/SiC composites than that of C/C composites. The average coefficients of kinetic friction and static friction are about 0.34 and 0.41, respectively, the wet fading ratio is about 2.9%, the linear wear rate is less then 1.9μm·cycle^-1, and the coefficient of friction is stable. The surface microstructure and wear debris on wear-induced surfaces of C/SiC disks were investigated by optical microscope and SEM. The results indicate that the main wear mechanism of the C/SiC composites is the grain-abrasion. The wear resistance is improved due to the enhanced in-plane shear strength derived from the fiber bundle vertical to the friction surface.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期927-934,共8页
Journal of Inorganic Materials
基金
陕西省自然科学基金(2004E116)
教育部跨世纪人才堵养计划基金(2002)
