TY - JOUR
T1 - Dependence of atomic oxygen resistance and the tribological properties on microstructures of WS 2 films
AU - Xu, Shusheng
AU - Gao, Xiaoming
AU - Hu, Ming
AU - Sun, Jiayi
AU - Jiang, Dong
AU - Wang, Desheng
AU - Zhou, Feng
AU - Weng, Lijun
AU - Liu, Weimin
PY - 2014/4/15
Y1 - 2014/4/15
N2 - To study the anti-oxidation mechanism of WS 2 films, the pure WS 2 , and Al doped WS 2 composite films were prepared via radio frequency sputtering and the atomic oxygen (AO) irradiation tests were conducted using a ground AO simulation facility. The tribological properties of both films before and after AO irradiation were evaluated using vacuum ball-on-disk tribo-tester. The incorporation of a small fraction of Al dopant resulted in microstructure change from loose columnar platelet with significant porosity for pure WS 2 film to very dense structure. In pure WS 2 film, WS 2 exists as crystalline phase with edge-plane preferential orientation, but nanocrystalline and amorphous phase coexists for the WS 2 -Al composite film. Even if large amount of AO transported into the interior through the longitudinal pores, the pure film showed good AO irradiation resistance owing to the basal plane of WS 2 crystal exhibiting much higher anti-oxidation capacity than the edge-plane. The composite film also had excellent AO irradiation resistance due to the formation of effective thinner WO 3 cladding layer in the sub-surface layer. Tribological results revealed that the composite films showed a significantly improved wear resistance, in comparison to the pure WS 2 film. Besides, due to the effective AO resistance, the tribological properties of WS 2 films remained almost unchanged before and after AO irradiation.
AB - To study the anti-oxidation mechanism of WS 2 films, the pure WS 2 , and Al doped WS 2 composite films were prepared via radio frequency sputtering and the atomic oxygen (AO) irradiation tests were conducted using a ground AO simulation facility. The tribological properties of both films before and after AO irradiation were evaluated using vacuum ball-on-disk tribo-tester. The incorporation of a small fraction of Al dopant resulted in microstructure change from loose columnar platelet with significant porosity for pure WS 2 film to very dense structure. In pure WS 2 film, WS 2 exists as crystalline phase with edge-plane preferential orientation, but nanocrystalline and amorphous phase coexists for the WS 2 -Al composite film. Even if large amount of AO transported into the interior through the longitudinal pores, the pure film showed good AO irradiation resistance owing to the basal plane of WS 2 crystal exhibiting much higher anti-oxidation capacity than the edge-plane. The composite film also had excellent AO irradiation resistance due to the formation of effective thinner WO 3 cladding layer in the sub-surface layer. Tribological results revealed that the composite films showed a significantly improved wear resistance, in comparison to the pure WS 2 film. Besides, due to the effective AO resistance, the tribological properties of WS 2 films remained almost unchanged before and after AO irradiation.
KW - Al doping
KW - Atomic oxygen resistance
KW - Microstructure
KW - Tribological properties
KW - WS2
UR - http://www.scopus.com/inward/record.url?scp=84896736245&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2014.01.002
DO - 10.1016/j.apsusc.2014.01.002
M3 - 文章
AN - SCOPUS:84896736245
SN - 0169-4332
VL - 298
SP - 36
EP - 43
JO - Applied Surface Science
JF - Applied Surface Science
ER -