摘要
采用快速热压烧结法制备了 B4 C颗粒增强 Mo Si2 基复合材料 ,研究了填料含量对材料的微观结构、力学性能以及摩擦学性能的影响 .结果表明 ,随 B4 C含量的增加 ,复合材料的硬度增大 ,摩擦系数及磨损率降低 .其原因在于 B4 C抑制 Mo Si2 的氧化、减少颗粒间玻璃相的生成 ,从而提高了颗粒间的界面结合强度 .此外 。
B4 particles-reinforced MoSi2-based composites were prepared by rapid heat compression molding. The influence of the B4C particle content on the microstructure, mechanical properties and tribological behavior of MoSi2-based composites was investigated. The results show that with the increase of B4C particle content, the hardness of the composite is increased, while the friction coefficient and the wear rate are decreased. It is supposed that B4C particles can retard the oxidation of MoSi2N, preventing the formation of glass phase between crystals and improving the interface combination of crystals. The tribochemical product is also beneficial for the modification of the tribological properties of B4C particles-reinforced MoSi2-based composites.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2002年第4期263-267,共5页
Tribology
基金
国家自然科学基金资助项目 (2 98710 3 3 )
