(1. 五邑大学 化学与环境工程系，江门 529020；
2． 中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 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1~6μN下， 研究了Si3N4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; 碳化硼材料纳米摩擦因数随载荷的增加而显著增加。
关键字: 碳化硼； 原子力/摩擦力显微镜； 表面形貌； 纳米摩擦因数
（1. Department of Chemistry & Environment Engineering, Wuyi University,
Jiangmen 529020, China;
2. State Key Laboratory for Powder Metallurgy, Central South University,
Changsha 410083, China）
Abstract:The topographical characteristics of the boron carbide sample surfaces were investigated with atomic force microscope/friction force microscope (AFM/FFM). As the results, the samples are of good consolidation and the surfaces of the polished samples are even. The friction force distributions of Si3N4 tip scanning over the boron carbide surfaces were investigated at load 1μN to 6μN, 1μN a step. The results show that friction force changes with the surge of surface topography. The steeper slope of surface topography links with the higher friction force. Friction forces are almost uniform at certain normal load since the surface is even. The nano tribological friction coefficient of boron carbide increases with the normal load rising.
Key words: boron carbide; AFM/FFM; surface topography; nano friction coefficient
