Nonuniform transitions of heavy-ion irradiated a-C:H films: Structure and antiwear property degradation analysis 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Carbon: An International Journal Sponsored by the American Carbon Society
年/卷/期
2019 / 146 /
页码
200-209
ISSN号
0008-6223
作者单位
Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;Shenzhen Univ, Coll Mechatron & Control Engn, Guangdong Prov Key Lab Micro Nano Optomechatron E, Shenzhen 518060, Peoples R China;Shenzhen Univ, Coll Mechatron & Control Engn, Guangdong Prov Key Lab Micro Nano Optomechatron E, Shenzhen 518060, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China;
作者
Xu, Jiao;Duan, Zewen;Qiao, Li;Chai, Liqiang;Chen, Zhang;Guo, Dengji;Wang, Peng;Liu, Weimin;
摘要
A study on hydrogenated amorphous carbon films (a-C: H) was performed to assess the heavy-ion radiation damage and the nature of defects produced by 1.0MeV Ni ions of fluences varying between 10(14)-10(15) ions/cm(2). The morphology, chemical and optical structures, and mechanical and tribological properties of the films before and after irradiation were examined. Additionally, the effects of nonuniform structures throughout the films on their antiwear properties were discussed. Studies of the wear tracks have suggested that above the maximum damage depth, film wear rates are mainly related to surface roughness, while after that depth, a rapid failure occurs and wear rates change to be closely related to the irradiation fluence. By making steel pits on irradiated films at varied depths of 0-900 nm, visible/ultra violet Raman diagnostics in the depth direction in the definite penetration depth were achieved, and some striking observations were made that the local sp(3)-to-sp(2) transition in the projected range is approximately 700 nm, accompanied by a bombardment-induced hydrogen release that is most severe on the topmost surface of a-C: H films. It is the combined effects of these two factors that contribute to the rapid failure of irradiated films, particularly at the depth of the projected range. (c) 2019 Elsevier Ltd. All rights reserved.
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