高比热容膨润土增强聚合物基摩擦材料性能研究  

Effect of Bentonite of High Specific Heat on Properties of Polymer Matrix Friction Materials

作　　者：王占红[1] 侯贵华[2] 何文平[1] 张勇[1] 李飞[1] 

机构地区：[1]盐城工学院材料工程学院,江苏盐城224051 [2]盐城工学院江苏省新型环保重点实验室,江苏盐城224051

出　　处：《润滑与密封》2015年第9期72-77,共6页Lubrication Engineering

基　　金：江苏省新型环保重点实验室开放基金项目(AE201019)

摘　　要：采用热压成型工艺制备出高比热膨润土增强的聚合物基摩擦材料,研究高比热容膨润土对聚合物基摩擦材料的物理力学性能和摩擦磨损性能的影响,借助扫描电子显微镜观察摩擦材料的磨损表面形貌,并分析其磨损机制。研究表明:随膨润土含量增加,摩擦材料硬度逐渐降低,密度和冲击强度则呈线性增大趋势;膨润土的质量分数低于40%时,能够提高摩擦材料的摩擦因数,降低磨损,其中以膨润土质量分数为40%的摩擦材料综合性能最好;膨润土质量分数大于40%时,摩擦材料的摩擦稳定性下降,磨损形式也由黏着磨损为主转变为以黏着磨损和热磨损为主。Polymer matrix friction materials filled with bentonite of high specific heat were prepared by heat-press molding method.The effect of bentonite content on physical and mechanical properties and tribological behaviors of polymer matrix friction materials was investigated. Scanning electron microscopy （ SEM ） was employed to study the character of worn surface of different friction materials, and analyze the wear mechanism.The results show that the hardness of friction materials was decreased gradually with the increasing of the bentonite content, while the density and impact strength are linearly increased.The friction materials with mass fraction of less than 40% bentonite can greatly improve friction coefficient and reduce wear rate of friction materials.Particularly ,the material with mass fraction 40% bentonite exhibits the best comprehensive properties.But the mass fraction of bentonite is more than 40%, the friction stability of friction materials is decreased, and the wear form is changed from main abrasive wear into main heat wear and abrasive wear

关 键 词：膨润土 聚合物基摩擦材料 抗热衰退性 力学性能 摩擦磨损 

分 类 号：TB332[一般工业技术—材料科学与工程] TH117.1[机械工程—机械设计及理论]