Tribological Behavior of Polytetrafluoroethylene Coatings Based on LY12 Substrates in the Space Environment

The spacecraft space radiation environment was simulated by 60Co source. The polytetrafluoroethylene （PTFE） coatings were fabricated on LY12 substrates. And the effect of gamma （7） irradiation on the tribological behavior of PTFE coatings under vacuum conditions was investigated. Results indicate th...

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Published inShanghai jiao tong da xue xue bao Vol. 19; no. 5; pp. 636 - 640
Main Author 袁兴栋 刘勇 杨德庄 何世禹
Format Journal Article
LanguageEnglish
Published Heidelberg Shanghai Jiaotong University Press 01.10.2014
Subjects
Aluminum base alloys
Architecture
Coatings
Computer Science
Electrical Engineering
Engineering
Friction
Life Sciences
Materials Science
Polytetrafluoroethylenes
Scanning electron microscopy
Sliding
Space environment
Spacecraft
Tribology
Wear
high vacuum
sliding wear
two-body abrasion
polymers
TG 115.5
Online AccessGet full text
ISSN1007-1172
1995-8188
DOI10.1007/s12204-014-1553-z

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Summary:The spacecraft space radiation environment was simulated by 60Co source. The polytetrafluoroethylene （PTFE） coatings were fabricated on LY12 substrates. And the effect of gamma （7） irradiation on the tribological behavior of PTFE coatings under vacuum conditions was investigated. Results indicate that the radiation dose has insignificant effect on the friction coefficient of PTFE coatings, and the wear of PTFE coatings reduces with the increase of gamma dose. As the gamma dose was 100 kGy, the friction coefficient of the PTFE coatings first increased with the increase of sliding velocity and then decreased, and the wear of the PTFE coatings decreased with the increase of sliding speed. As the gamma dose was 100 kGy, the friction coefficient of the PTFE coatings first decreased with the increase of load and then increased, and the wear rate of PTFE coatings increased with the increase of load. Scanning electron microscoDe was utilized.
Bibliography:sliding wear, two-body abrasion, polymers, high vacuum
The spacecraft space radiation environment was simulated by 60Co source. The polytetrafluoroethylene （PTFE） coatings were fabricated on LY12 substrates. And the effect of gamma （7） irradiation on the tribological behavior of PTFE coatings under vacuum conditions was investigated. Results indicate that the radiation dose has insignificant effect on the friction coefficient of PTFE coatings, and the wear of PTFE coatings reduces with the increase of gamma dose. As the gamma dose was 100 kGy, the friction coefficient of the PTFE coatings first increased with the increase of sliding velocity and then decreased, and the wear of the PTFE coatings decreased with the increase of sliding speed. As the gamma dose was 100 kGy, the friction coefficient of the PTFE coatings first decreased with the increase of load and then increased, and the wear rate of PTFE coatings increased with the increase of load. Scanning electron microscoDe was utilized.
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ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-014-1553-z