摘要
用机械共混、冷压成型、烧结的方法制备聚苯硫醚(PPS)和纳米Al2O3填充聚四氟乙烯(PTFE)复合材料试样;用MRH-3型环-块试验机测试在干摩擦条件下各试样的摩擦磨损性能;用SEM对试样的磨损表面与转移膜表面的形貌进行观察和分析,并探讨磨损机制。结果表明:PPS质量分数为5%时,PPS/PTFE复合材料的摩擦因数和体积磨损率均达到最小值;纳米Al2O3的加入进一步改善了PPS/PTFE复合材料的摩擦学性能,当其质量分数为5%时,纳米Al2O3/PPS/PTFE复合材料体积磨损率最小,耐磨性较纯PTFE提高了276倍。扫描电子显微镜显示,室温下PTFE、PPS/PTFE和纳米Al2O3/PPS/PTFE复合材料的磨损机制主要是黏着磨损,而150℃时纳米Al2O3/PPS/PTFE复合材料伴有磨粒磨损。
PPS/PTFE and nano-Al2 O3/PPS/PTFE composites were prepared by molding-sintering method. The tribological and wear behaviors of nano-Al2O3 and PPS filled PTFE composites were studied with a MRH-3 block-on ring friction and wear tester. The worn surface and transfer film of the composites were inspected by scanning electronic microscopy （ SEM）, and the abrasion mechanism was discussed. The results show that the friction coefficient and volume wear rate of the PPS/PTFE composites reach the lowest level with 5% PPS. With the adding of nano-Al2O3, the tribological behavior of PPS/PTFE blends is improved a lot, when nano-Al2O3 mass fraction is 5%, compared with virgin PTFE, the wear resistance is improved more than 276 times. The Scanning Electron Microscope （SEM） result shows the wear mechanisms of virgin PTFE, PPS/PTFE composites and nano-Al2O3 reinforced PPS/PTFE blends are adhesive wear at room temperature, at temperature of 150 ℃, abrasive wear also happens for nano-Al2O3 reinforced PPS/PTFE.
出处
《润滑与密封》
CAS
CSCD
北大核心
2013年第11期72-77,共6页
Lubrication Engineering
关键词
聚苯硫醚
摩擦学性能
聚四氟乙烯
磨损机制
polyphenylene sulfide
tribological behavior
PTFE
abrasion mechanism
