烧结温度对煤沥青中间相基炭材料的微观结构和摩擦性能的影响  

Effect of sintering temperature on friction and microstructure of carbon material deriving from coal tar pitch

作　　者：梁志勇[1] 刘鹏[1] 刘其城[1] 

机构地区：[1]长沙理工大学物理与电子科学学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2011年第2期72-75,80,共5页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(20876016);湖南省重点学科预备学科建设资助项目

摘　　要：以中间相炭微球(MCMB)为原料,酚醛树脂为粘结剂,通过特定冷压烧结工艺对其进行烧结,制得各向同性炭块.研究了在不同烧结温度制品的收缩率和耐磨性,采用扫描电子显微镜(SEM)观测了断面微观结构及磨痕.研究结果表明,在热处理过程中,炭材料的炭化失重,体积收缩主要发生在低温处理阶段;经过900～1 300℃热处理后的制品具有极为密实的微观结构;1 300℃热处理后MCMB模压制品材料的密度为1.62g/cm3,摩擦系数为0.202,炭材料的微观结构更加致密,且提高了材料的耐磨性.Isotropic bulk carbon was prepared through cold-press sintering process with mesocarbon microbeads（MCMB） as raw materials and phenol aldehyde resin as the binder. The effects of sintering temperature on the shrinkage and the wearability were investigated. The crosssection microstructure and the scratch were observed by SEM. It is indicated that the weight loss and the volume shrinkage of bulk MCMB occur in the low temperature region. The dense microstructure was obtained after heat treatment at 900-1 300 ℃. The density and the friction coefficient of samples as prepared reach 1.62 g/cm^3 and 0. 202 respectively. The wearability of carbon materials was improved due to the compact microstructure.

关 键 词：中间相炭微球 冷压烧结 微观结构 耐摩性 

分 类 号：TQ536.9[化学工程—煤化学工程]