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Materials 2017, 10(2), 159; doi:10.3390/ma10020159

Friction Durability of Extremely Thin Diamond-Like Carbon Films at High Temperature

1
Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro-machi, Saitama 345-8501, Japan
2
Faculty of Literature, Nishogakusha University, 6-16, Sanbancho, Chiyoda-ku, Tokyo 102-8336, Japan
*
Author to whom correspondence should be addressed.
Received: 13 November 2016 / Accepted: 3 February 2017 / Published: 10 February 2017
(This article belongs to the Special Issue Tribological Behavior of Materials by Surface Engineering)
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Abstract

To clarify the friction durability, both during and after the high-temperature heating of nanometer-thick diamond-like carbon (DLC) films, deposited using filtered cathodic vacuum arc (FCVA) and plasma chemical vapor deposition (P-CVD) methods, the dependence of the friction coefficient on the load and sliding cycles of the DLC films, were evaluated. Cluster-I consisted of a low friction area in which the DLC film was effective, while cluster-II consisted of a high friction area in which the lubricating effect of the DLC film was lost. The friction durability of the films was evaluated by statistical cluster analysis. Extremely thin FCVA-DLC films exhibited an excellent wear resistance at room temperature, but their friction durability was decreased at high temperatures. In contrast, the durability of the P-CVD-DLC films was increased at high temperatures when compared with that observed at room temperature. This inverse dependence on temperature corresponded to the nano-friction results obtained by atomic force microscopy. The decrease in the friction durability of the FCVA-DLC films at high temperatures, was caused by a complex effect of temperature and friction. The tribochemical reaction produced by the P-CVD-DLC films reduced their friction coefficient, increasing their durability at high temperatures. View Full-Text
Keywords: friction durability; high temperature; extremely thin film; diamond-like carbon (DLC); nano-friction friction durability; high temperature; extremely thin film; diamond-like carbon (DLC); nano-friction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Miyake, S.; Suzuki, S.; Miyake, M. Friction Durability of Extremely Thin Diamond-Like Carbon Films at High Temperature. Materials 2017, 10, 159.

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