Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition

Abstract In this study, silicon (Si) was doped on a tetrahedral amorphous carbon (ta-C) coating and the tribological characteristics of the resulting Si-doped diamond-like carbon (DLC; a-C:Si:H) were investigated against a SUJ2 ball. The Si fraction in the coating was varied from 0 to ~ 20 at.% by i...

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Autores principales:	Jae-Il Kim, Young-Jun Jang, Jisoo Kim, Jongkuk Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/39222e35881e4657a6876f62c480ad43
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spelling	oai:doaj.org-article:39222e35881e4657a6876f62c480ad432021-12-02T14:11:31ZEffects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition10.1038/s41598-021-83158-42045-2322https://doaj.org/article/39222e35881e4657a6876f62c480ad432021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83158-4https://doaj.org/toc/2045-2322Abstract In this study, silicon (Si) was doped on a tetrahedral amorphous carbon (ta-C) coating and the tribological characteristics of the resulting Si-doped diamond-like carbon (DLC; a-C:Si:H) were investigated against a SUJ2 ball. The Si fraction in the coating was varied from 0 to ~ 20 at.% by increasing the trimethylsilane gas flow rate during filtered cathodic vacuum arc deposition. The coefficient of friction (CoF) showed no obvious change when the Si fraction was less than ~ 7 at.%. However, after Si doping, it significantly decreased when the Si fraction was greater than ~ 8 at.%. The running-in period also decreased to less than 1000 cycles after Si doping. The rapid formation of Si-rich debris and transfer layer led to the fabrication of a low-friction tribofilm, which was induced by the tribochemical reaction with moisture under ambient conditions. When the Si fraction was ~ 17 at.%, the lowest CoF of less than 0.05 was obtained. Further Si doping beyond the critical point led to the destruction of the film because of reduced hardness.Jae-Il KimYoung-Jun JangJisoo KimJongkuk KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jae-Il Kim Young-Jun Jang Jisoo Kim Jongkuk Kim Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
description	Abstract In this study, silicon (Si) was doped on a tetrahedral amorphous carbon (ta-C) coating and the tribological characteristics of the resulting Si-doped diamond-like carbon (DLC; a-C:Si:H) were investigated against a SUJ2 ball. The Si fraction in the coating was varied from 0 to ~ 20 at.% by increasing the trimethylsilane gas flow rate during filtered cathodic vacuum arc deposition. The coefficient of friction (CoF) showed no obvious change when the Si fraction was less than ~ 7 at.%. However, after Si doping, it significantly decreased when the Si fraction was greater than ~ 8 at.%. The running-in period also decreased to less than 1000 cycles after Si doping. The rapid formation of Si-rich debris and transfer layer led to the fabrication of a low-friction tribofilm, which was induced by the tribochemical reaction with moisture under ambient conditions. When the Si fraction was ~ 17 at.%, the lowest CoF of less than 0.05 was obtained. Further Si doping beyond the critical point led to the destruction of the film because of reduced hardness.
format	article
author	Jae-Il Kim Young-Jun Jang Jisoo Kim Jongkuk Kim
author_facet	Jae-Il Kim Young-Jun Jang Jisoo Kim Jongkuk Kim
author_sort	Jae-Il Kim
title	Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
title_short	Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
title_full	Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
title_fullStr	Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
title_full_unstemmed	Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
title_sort	effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/39222e35881e4657a6876f62c480ad43
work_keys_str_mv	AT jaeilkim effectsofsilicondopingonlowfrictionandhighhardnessdiamondlikecarboncoatingviafilteredcathodicvacuumarcdeposition AT youngjunjang effectsofsilicondopingonlowfrictionandhighhardnessdiamondlikecarboncoatingviafilteredcathodicvacuumarcdeposition AT jisookim effectsofsilicondopingonlowfrictionandhighhardnessdiamondlikecarboncoatingviafilteredcathodicvacuumarcdeposition AT jongkukkim effectsofsilicondopingonlowfrictionandhighhardnessdiamondlikecarboncoatingviafilteredcathodicvacuumarcdeposition
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Effects of silicon doping on low-friction and high-hardness diamond-like carbon coating via filtered cathodic vacuum arc deposition

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