摘要
采用粉末冶金热压烧结工艺制备了一种在高温下具有良好摩擦学性能的Fe-Mo-(MoS2/PbO)自润滑材料,考察了其在室温和600℃下的摩擦磨损性能,并运用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)等分析手段揭示了Fe-Mo-(MoS2/PbO)高温自润滑材料的摩擦磨损机理。研究结果表明:由于摩擦和高温氧化作用,该类材料在600℃下磨损表面的复合润滑膜(由PbMoO4、Pb、Fe2O3和Fe3O4组成)是其具有良好自润滑性能的主要原因。
The Fe-Mo-（MoS2/PbO） high temperature self-lubricating materials were prepared by hot-pressing at elevated temperatures. The friction and wear behaviors of the composites with different amount of solid lubricants sliding against 40Cr steel at ambient temperature and 6000C were evaluated on a high temperature tribometer with a pin-on-disc configuration. The wear mechanism of Fe-Mo-（MoS2/PbO） was discussed based on observation and analysis of the microstructures and worn surface by scanning electron microscope （SEM）,X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. Results show that the formation of a black glaze layer on the worn surfaces of Fe-Mo-（MoS2/PbO） at 600℃ can be observed. The Fe-Mo-（MoS2/PbO） high temperature self-lubricating material showed good self-lubricating ability and wear-resistance at 600℃. Meanwhile the composites provided good protection of the counterpart steel against wear at 600℃. It was attributed to the formation of a lubricating film （PbMoO4 ,Pb,Fe2O3 and Fe2O4） on the worn surface of the Fe-Mo-（MoS2/PbO）. PbMoO4 was considered to be very important for the friction reduction and wear resistance at 600℃.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第1期118-120,共3页
Journal of Materials Science and Engineering
关键词
高温自润滑材料
复合润滑膜
钼酸铅
摩擦学特性
high temperature self-lubricating material
the compound lubricating film
PbMoO4
friction and ware behavior
