TY - JOUR
T1 - Structural evolution and wear resistance of MoS2–Based lubricant films irradiated by heavy ions
AU - Duan, Zewen
AU - Zhao, Xiaoyu
AU - Qiao, Li
AU - Zhao, Yunbiao
AU - Fu, Engang
AU - Wang, Peng
AU - Liu, Weimin
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/25
Y1 - 2019/11/25
N2 - In this work, a 2 MeV Au2+ ion irradiation was implemented to simulate the neutron damage on magnetron sputtered MoS2-based composite films. The irradiation damage mechanism and the wear resistance of films were accessed as a function of increasing Au2+ fluence. The XRD as well as the cross-section TEM images results reveal that the intrinsic crystallites of MoS2 in Mo-S-Ti composite films are more easily to be destructed. At the low fluence of 1 × 1014 Au2+/cm2, the irradiation damage peak was mainly distributed in depth of 0.45 μm – 0.7 μm in films. While, with the increase of the incident fluence, the disordering of MoS2 crystallites near the film surface were also become serious, and they are fully amorphized at the end of the studied fluence of 3.3 × 1015 ion/cm2 due to the accumulation effect induced by the ion collisions. Nonetheless, the tribotests in vacuum show that the lubricity of MoS2 phases would not be immediately failured due to their damage of intrinsic structure of MoS2 crystallites, and only enhancing the irradiation to the high dose (2, 5 and 1 dpa), a rapid degradation of lubricity will be observed.
AB - In this work, a 2 MeV Au2+ ion irradiation was implemented to simulate the neutron damage on magnetron sputtered MoS2-based composite films. The irradiation damage mechanism and the wear resistance of films were accessed as a function of increasing Au2+ fluence. The XRD as well as the cross-section TEM images results reveal that the intrinsic crystallites of MoS2 in Mo-S-Ti composite films are more easily to be destructed. At the low fluence of 1 × 1014 Au2+/cm2, the irradiation damage peak was mainly distributed in depth of 0.45 μm – 0.7 μm in films. While, with the increase of the incident fluence, the disordering of MoS2 crystallites near the film surface were also become serious, and they are fully amorphized at the end of the studied fluence of 3.3 × 1015 ion/cm2 due to the accumulation effect induced by the ion collisions. Nonetheless, the tribotests in vacuum show that the lubricity of MoS2 phases would not be immediately failured due to their damage of intrinsic structure of MoS2 crystallites, and only enhancing the irradiation to the high dose (2, 5 and 1 dpa), a rapid degradation of lubricity will be observed.
KW - Friction coefficient
KW - Ion irradiation
KW - Microstructure evolution
KW - MoS-Based composite films
KW - Wear lives
UR - http://www.scopus.com/inward/record.url?scp=85074459826&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2019.125077
DO - 10.1016/j.surfcoat.2019.125077
M3 - 文章
AN - SCOPUS:85074459826
SN - 0257-8972
VL - 378
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 125077
ER -