纳米氮化硼/氮化硅改性聚四氟乙烯涂层高温下的摩擦学性能  

Tribological Properties of Nano-Boron Nitride/Silicon Nitride Modified Polytetrafluoroethylene Coatings at High Temperature

作　　者：陈义 卞达 赵永武 CHEN Yi;BIAN Da;ZHAO Yongwu(Suzhou Nilfisk R&D Co.,Ltd.Suzhou,Jiangsu 215000,China;School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu 214100,China)

机构地区：[1]苏州力奇研发有限公司,江苏苏州215000 [2]江南大学机械工程学院,江苏无锡214100

出　　处：《塑料》2022年第3期22-25,共4页Plastics

基　　金：国家自然科学基金(51675232);江苏省自然科学基金(BK20190611);苏州市科协软科学课题立项项目。

摘　　要：为提高聚四氟乙烯(PTFE)涂层高温耐磨损性能,以纳米氮化硼和纳米氮化硅颗粒为增强剂,聚酰胺酰亚胺(PAI)为粘结剂,制备了PTFE复合涂层,研究了其在120、200、300℃温度下的摩擦学行为。研究结果表明,添加纳米氮化硼和氮化硅颗粒后,涂层的硬度与未添加纳米颗粒的涂层相比,提高了11.2%;在不同温度下,添加纳米氮化硼和氮化硅颗粒涂层的摩擦因数和磨损率均低于未添加纳米颗粒的涂层。磨痕表面微观形貌表明,2种涂层在120℃时,磨痕表面光滑且无明显裂纹。在200、300℃下,磨痕表面均出现了不同程度的裂纹,通过对比可知,添加纳米颗粒的涂层表面缺陷明显优于未添加纳米颗粒的涂层表面。In order to improve the high temperature wear resistance of polytetrafluoroethylene(PTFE)coating,nano boron nitride and nano silicon nitride particles were used as reinforcing agents and polyamide imide(PAI)as binder to prepare PTFE composite coating.The tribological behavior of PTFE composite coating at 120℃,200℃and 300℃was studied.The results showed that the hardness of the coating with nano boron nitride and silicon nitride particles increases by 11.2%compared with the coating without nano particles;the friction coefficient and wear rate of the coating with nano boron nitride and silicon nitride particles were lower than those without nano particles at different temperatures.The micro morphology of the wear scar surface showed that the wear scar surface of the two coatings was smooth without obvious cracks at 120℃.However,at 200℃and 300℃,there were different degrees of cracks on the wear scar surface,but the surface defects of the coating with nano particles were obviously better than those of the coating without nano particles.

关 键 词：聚四氟乙烯 氮化硼 氮化硅 温度 摩擦 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]