BaSO4/PTFE复合材料在干摩擦条件下的摩擦磨损机理研究
BaSO4/PTFE复合材料在干摩擦条件下的摩擦磨损机理研究颜录科 李炜光 寇开昌 孙增智 徐鸥明长安大学交通铺面材料教育部工程研究中心,西安710064 西北工业大学理学院应用化学系,西安710072
摘 要:采用高速混合、冷压烧结成型的方法通过填充改性制备BaSO4/PTFE复合材料,利用M-200型摩擦磨损试验机研究复合材料在干摩擦条件下的摩擦学行为,考察BaSO4用量对复合材料摩擦磨损性能的影响,并采用扫描电子显微镜对试样磨损表面进行观察和分析,揭示摩擦磨损机理。结果表明,BaSO4可显著提高复合材料的耐磨损性能,在用量为30%时,耐磨损性能与纯PTFE相比提高了两个数量级; PTFE以粘着磨损为主,随着BaSO4用量增加,磨粒磨损逐渐占主导,粘着磨损逐渐减少,并最终表现出疲劳磨损特征。[著者文摘]
关键词:聚四氟乙烯 硫酸钡 填充 摩擦磨损
分类号: TQ325.4[著者标引]文献标识码：A文章编号：1005-5053（2010）05-0078-04栏目信息：
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Frication and Wear Mechanism of BaSO_4/PTFE Composites under Dry ConditionsYAN Lu-ke,LI Wei-guang,Kou Kai-chang,SUN Zeng-zhi,XU Ou-min1.Engineering Research Center of Transportation Materials,Ministry of Education,Chang′an University,Xi′an 710064,China;2.Applied Chemistry Department,School of Science,Northwestern Polytechnical University,Xi′an 710072,ChinaAbstract:BaSO4/PTFE composites were prepared using barium sulfate（BaSO4） particles filling polytetrafluoroethylene（PTFE） by high speed mechanically mixture,cold moulding and sintering in the air.The tribological properties of the composites were evaluated on an M-200 tester under dry sliding condition.The effects of BaSO4 amount on the friction and wear properties of the BaSO4/PTFE composites were investigated.The results showed that,the wear resistance of PTFE was improved by filling BaSO4 particles remarkably,30%BaSO4/70%PTFE composites＇ was increased two orders of magnitude compared to neat PTFE.And the worn surface morphologies of composites were characterized and analyzed by scanning electron microscope.The results indicated that,the friction and wear mechanism of the BaSO4/PTFE composites was changed from the adhesive wear to the abrasive wear and the fatigue wear with increasing amount of BaSO4.[著者文摘]
Key words: PTFE; BaSO4; filling; friction and wear
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