(1. 五邑大學(xué) 化學(xué)與環(huán)境工程系，江門 529020；
2． 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 用原子力/摩擦力顯微鏡對(duì)碳化硼樣品進(jìn)行了表面形貌的微觀分析。 在載荷為1~6μN(yùn)下， 研究了Si3N4探針掃描碳化硼表面時(shí)摩擦力的分布。結(jié)果表明: 摩擦力的變化與掃描處的試樣表面形貌有關(guān)， 表面形貌變化斜率越大處， 摩擦力增加得越多; 由于試樣較平整， 摩擦力的分布是比較均勻的; 碳化硼材料納米摩擦因數(shù)隨載荷的增加而顯著增加。
關(guān)鍵字: 碳化硼； 原子力/摩擦力顯微鏡； 表面形貌； 納米摩擦因數(shù)
（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(yùn) to 6μN(yùn), 1μN(yùn) 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
