碳化硼陶瓷的表面形貌和摩擦性能

Nano tribology properties of boron carbide ceramic studied by atomic force microscope

用原子力 /摩擦力显微镜对碳化硼样品进行了表面形貌的微观分析。在载荷为 1～ 6 μN下 ,研究了Si3 N4探针扫描碳化硼表面时摩擦力的分布。结果表明 :摩擦力的变化与扫描处的试样表面形貌有关 ,表面形貌变化斜率越大处 ,摩擦力增加得越多 ;由于试样较平整 ,摩擦力的分布是比较均匀的 ;

The topographical characteristics of the boron carbide sa mp le surfaces were investigated with atomic force microscope/friction force micros cope (AFM/FFM). As the results, the samples are of good consolidation and the s urfaces of the polished samples are even. The friction force distributions of Si 3N 4 tip scanning over the boron carbide surfaces were investigated at load 1 μN to 6 μN, 1 μN a step. The results show that friction force changes wit h the surge of surface topography. The steeper slope of surface topography links with the higher friction force. Friction forces are almost uniform at certain n ormal load since the surface is even. The nano tribological friction coefficient of boron carbide increases with the normal load rising.