The effect of space irradiation on the lubricating performance of perfluoropolyether greases in simulated space environment

被引：12
|
作者：
Lv, Mei [1 ]
Wang, Huiyun [1 ]
Wang, Litao [1 ]
Kong, Fandong [1 ]
Wang, Tingmei [2 ]
Wang, Qihua [2 ]
机构：
[1] Jining Med Univ, Sch Pharm, Jining 272000, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China
来源：
LUBRICATION SCIENCE | 2017年 / 29卷 / 08期
关键词：
friction coefficient; lubricating grease; simulated space environment; wear rate; LOW-EARTH-ORBIT; ATOMIC OXYGEN; TRIBOLOGICAL PROPERTIES; ELECTRON-IRRADIATION; PROTON IRRADIATION; COATINGS INFLUENCE; MOS2; LUBRICANTS; WEAR PROPERTIES; UV-IRRADIATION; POLYIMIDE;
D O I：
10.1002/ls.1390
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this paper, 2 kinds of commercial perfluoropolyether (PFPE) greases were coated on the polyimide (PI) blocks, which were placed within simulated space environment including atomic oxygen (AO), proton (Pr), ultraviolet (UV), and electron (El) irradiations, and then the tribological performance has been investigated with a ball-on-disc tribometer. Results indicated that the MoS2-grease showed better lubrication performance than the PTFE-grease. The changes in infrared spectroscopy induced by Pr and El irradiations were more obvious than that by AO and UV irradiations. Results of energy dispersive X-ray spectroscopy indicated that Pr and El irradiations caused carbonation of greases, and AO and UV irradiations induced oxidation of greases. Referred to the tribological properties of PI coated with PFPE oil, PI coated with PFPE greases showed minor changes in friction coefficient and wear rate, and the MoS2 additives could significantly improve the lubrication properties of PFPE greases in simulated space environment.
引用
收藏
页码：567 / 575
页数：9
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