摘要
在XP-5型高温摩擦磨损试验机上考察了MoSi2／SiC配对副在700～1100℃时的高温摩擦磨损性能，并用SEM扫描电镜和X射线衍射仪观察和分析了MoSi2／SiC磨损面的形貌与相组成。结果表明，MoSi2／SiC摩擦副在700～1100℃高温滑动时，摩擦系数随着温度的升高而下降；MoSi2的磨损率先随温度的升高而增加，并于1000℃达到极大值后下降；MoSi2的磨损机理主要表现为粘着、研磨和塑性变形等形式；对摩件SiC则随温度升高呈现出磨损增重现象，其主要磨损机理由700℃时的粘着磨损逐渐转化高温氧化磨损。
The friction and wear property of molybdenum dislicide （MoSi2） against SiC was investigated by using an XP-5 type high temperature friction and wear tester at 700-1100℃. Microphotographs and phases of the worn surface of MoSi2 and SiC were observed by SEM and X-ray, respectively. Results show that friction coefficient decreases with the increase of temperature, and the wear rate of MoSi2 rises at first when temperature heightening and drops after 1000℃. The wear mechanism of MoSiz mainly shows adhesion, abrasion and plastic forming in turn. However to SiC, mass-weighting phenomenon appears when it worn above 700℃, which is due to the serious oxidation effect when temperature heightening. It is the main wear mechanism of SiC that adhesion at 700℃ is changed to oxidation wear at higher temperature.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第9期1470-1472,共3页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50405041)
关键词
二硅化钼
高温磨损性能
磨损机理
SIC
MoSi2
wear behavior at elevated temperature
wear mechanism
SiC
