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- W3108538997 abstract "In this paper, the deposition process of amorphous carbon (a-C) films on γ-Fe substrate was simulated by molecular dynamics (MD). The effects of substrate bias voltage (abbreviated as bias) on structure and internal stress of a-C films was investigated. The results showed that the growth process of a-C films on γ-Fe substrate can be divided into five stages, namely, the diffusion stage of C atoms, island-like nucleation stage of a-C films, formation stage of the pseudo diffusion zone, diffusion stage of Fe atoms and stable growth stage of a-C films. The structure of a-C films after deposition can be divided into four zones, namely, the substrate zone, pseudo diffusion zone, intrinsic zone and surface zone. The intrinsic zone is the main part of a-C films, and its structure is mainly composed of sp3-C and sp2-C atoms. The percentage of sp3-C atoms is fluctuated with the increase of bias. When bias is 25 V, the percentage of sp3-C atoms is the largest, which is 26.19%. When bias is 75 V, the percentage of sp3-C atoms is the smallest, which is 23.92%. The percentage of sp2-C atoms is increased with the increase of bias. When bias is 75 V, the percentage of sp2-C atoms is the largest, which is 73.69%. With the increase of bias, the internal stress of the intrinsic zone is firstly increased. When bias is 25 V, the internal stress is the highest, which is 6.94 GPa and then is decreased gradually. The pseudo diffusion zone is a transition zone between a-C films and γ-Fe substrate, and is a mixed zone composed of C and Fe atoms. With the increase of bias, the internal stress in the pseudo diffusion zone is decreased gradually. When bias is 75 V, the internal stress is the lowest, which is 0.40 GPa." @default.
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- W3108538997 date "2021-02-01" @default.
- W3108538997 modified "2023-10-17" @default.
- W3108538997 title "Effects of substrate bias voltage on structure and internal stress of amorphous carbon films on γ-Fe substrate: Molecular dynamics simulation" @default.
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- W3108538997 doi "https://doi.org/10.1016/j.commatsci.2020.110206" @default.
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