Cargando…

Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes

The textured design of amorphous carbon (a-C) film can significantly improve the tribological performance and service life of moving mechanical components. However, its friction dependence on different texture shapes, especially under different load conditions, remains unclear. In particular, due to...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Zan, Du, Naizhou, Li, Xiaowei, Wei, Xubing, Ding, Jiaqing, Lu, Shiqi, Du, Shuangjiang, Feng, Cunao, Chen, Kai, Zhang, Dekun, Lee, Kwang-Ryeol
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10532578/
https://www.ncbi.nlm.nih.gov/pubmed/37763384
http://dx.doi.org/10.3390/ma16186108
_version_ 1785111993683804160
author Chen, Zan
Du, Naizhou
Li, Xiaowei
Wei, Xubing
Ding, Jiaqing
Lu, Shiqi
Du, Shuangjiang
Feng, Cunao
Chen, Kai
Zhang, Dekun
Lee, Kwang-Ryeol
author_facet Chen, Zan
Du, Naizhou
Li, Xiaowei
Wei, Xubing
Ding, Jiaqing
Lu, Shiqi
Du, Shuangjiang
Feng, Cunao
Chen, Kai
Zhang, Dekun
Lee, Kwang-Ryeol
author_sort Chen, Zan
collection PubMed
description The textured design of amorphous carbon (a-C) film can significantly improve the tribological performance and service life of moving mechanical components. However, its friction dependence on different texture shapes, especially under different load conditions, remains unclear. In particular, due to the lack of information regarding the friction interface, the underlying friction mechanism has still not been unveiled. Therefore, the effects of contact pressure and textured shapes on the tribological behavior of a-C films under dry friction conditions were comparatively studied in this work by reactive molecular dynamics simulation. The results show that under low contact pressure, the tribological property of a-C film is sensitive to the textured shape, and the system with a circular textured surface exhibits a lower friction coefficient than that with a rectangular textured surface, which is attributed to the small fraction of unsaturated bonds. However, the increase of contact pressure results in the serious reconstruction and passivation of the friction interface. On the one hand, this induces a growth rate of friction force that is much smaller than that of the normal load, which is followed by a significant decrease in the friction coefficient with contact pressure. On the other hand, the destruction or even disappearance of the textured structure occurs, weakening the difference in the friction coefficient caused by different textured shapes of the a-C surface. These results reveal the friction mechanism of textured a-C film and provide a new way to functionalize the a-C as a protective film for applications in hard disks, MEMS, and NEMS.
format Online
Article
Text
id pubmed-10532578
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-105325782023-09-28 Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes Chen, Zan Du, Naizhou Li, Xiaowei Wei, Xubing Ding, Jiaqing Lu, Shiqi Du, Shuangjiang Feng, Cunao Chen, Kai Zhang, Dekun Lee, Kwang-Ryeol Materials (Basel) Article The textured design of amorphous carbon (a-C) film can significantly improve the tribological performance and service life of moving mechanical components. However, its friction dependence on different texture shapes, especially under different load conditions, remains unclear. In particular, due to the lack of information regarding the friction interface, the underlying friction mechanism has still not been unveiled. Therefore, the effects of contact pressure and textured shapes on the tribological behavior of a-C films under dry friction conditions were comparatively studied in this work by reactive molecular dynamics simulation. The results show that under low contact pressure, the tribological property of a-C film is sensitive to the textured shape, and the system with a circular textured surface exhibits a lower friction coefficient than that with a rectangular textured surface, which is attributed to the small fraction of unsaturated bonds. However, the increase of contact pressure results in the serious reconstruction and passivation of the friction interface. On the one hand, this induces a growth rate of friction force that is much smaller than that of the normal load, which is followed by a significant decrease in the friction coefficient with contact pressure. On the other hand, the destruction or even disappearance of the textured structure occurs, weakening the difference in the friction coefficient caused by different textured shapes of the a-C surface. These results reveal the friction mechanism of textured a-C film and provide a new way to functionalize the a-C as a protective film for applications in hard disks, MEMS, and NEMS. MDPI 2023-09-07 /pmc/articles/PMC10532578/ /pubmed/37763384 http://dx.doi.org/10.3390/ma16186108 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chen, Zan
Du, Naizhou
Li, Xiaowei
Wei, Xubing
Ding, Jiaqing
Lu, Shiqi
Du, Shuangjiang
Feng, Cunao
Chen, Kai
Zhang, Dekun
Lee, Kwang-Ryeol
Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title_full Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title_fullStr Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title_full_unstemmed Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title_short Atomic-Scale Understanding on the Tribological Behavior of Amorphous Carbon Films under Different Contact Pressures and Surface Textured Shapes
title_sort atomic-scale understanding on the tribological behavior of amorphous carbon films under different contact pressures and surface textured shapes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10532578/
https://www.ncbi.nlm.nih.gov/pubmed/37763384
http://dx.doi.org/10.3390/ma16186108
work_keys_str_mv AT chenzan atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT dunaizhou atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT lixiaowei atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT weixubing atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT dingjiaqing atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT lushiqi atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT dushuangjiang atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT fengcunao atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT chenkai atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT zhangdekun atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes
AT leekwangryeol atomicscaleunderstandingonthetribologicalbehaviorofamorphouscarbonfilmsunderdifferentcontactpressuresandsurfacetexturedshapes