The spacecraft space radiation environment was simulated by 60Co source. The polytetrafluoroethylene
(PTFE) coatings were fabricated on LY12 substrates. And the effect of gamma (γ) 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 microscope was utilized.
YUAN Xing-dong1* (袁兴栋), LIU Yong2 (刘勇), YANG De-zhuang2 (杨德庄), HE Shi-yu2 (何世禹)
. Tribological Behavior of Polytetrafluoroethylene Coatings Based on LY12 Substrates in the Space Environment[J]. Journal of Shanghai Jiaotong University(Science), 2014
, 19(5)
: 636
-640
.
DOI: 10.1007/s12204-014-1553-z
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