纳米氧化物填充PTFE复合材料的摩擦学性能  

Friction and Wear Properties of PTFE Composties Filled with Nanometer Oxide

作　　者：史丽萍[1] 张静[1] 顾红艳[1] 路琴[1] 何春霞[1] 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《润滑与密封》2008年第12期68-71,共4页Lubrication Engineering

摘　　要：用机械共混、冷压成型烧结的方法分别制备了不同纳米氧化物填充PTFE复合材料试样。用MM-200型磨损试验机测试了在干摩擦条件下各试样的摩擦磨损性能;用扫描电子显微镜(SEM)对试样的混合程度和磨屑的形貌进行了观察和分析。结果表明:在实验条件下,纳米TiO2和纳米Al2O3的加入均可较大幅度提高PTFE的耐磨性,在250N载荷下,纳米TiO2和纳米Al2O3的加入可使PTFE耐磨性分别提高7.3和3.4倍;纳米TiO2和纳米Al2O3的加入对PT-FE摩擦因数影响不大;纳米TiO2和纳米Al2O3填充PTFE复合材料的磨损机制主要是粘着磨损。The composites of PTFE filled with different kinds of nanometer oxide were prepared by mechanical mixing, compressing molding and sintering. Under dry friction condition, the friction and wear properties of PTFE composites were studied on an MM-200 wear tester. The shape of wear debris and mixture of the composites were examined by means of SEM. The results show under the given condition in these experiments, the anti-wear property of PTFE filled with nano- TiO2 or nano-Al2O3 could be improved significantly. Under the high load of 250 N ,the anti-wear property of PTFE composites filled with nano-TiO2 and nano-Al20z is increased by 7.3 times and 3.4 times compared with that of pure PTFE material. The friction coefficient of PTFE composites is increased slightly. The main wear mechanism is adhesion wear.

关 键 词：PTFE 纳米AL2O3 纳米TIO2 表面处理 摩擦性能 

分 类 号：TB323[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]