Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films

Hydrogenated amorphous carbon (a-C:H) films exhibit excellent friction properties such as high mechanical hardness, high wear resistance, and low friction. a-C:H films have amorphous structures generally composed of sp2- and sp3-hybridized carbon, which bring about extraordinary friction properties....

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yuuki Tokuta, Masahiro Kawaguchi, Shinya Sasaki
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	hard coating hydrogenated amorphous carbon surface texture friction Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/4c5df49d38cb428f8cc0047fc91f3089
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4c5df49d38cb428f8cc0047fc91f3089
record_format	dspace
spelling	oai:doaj.org-article:4c5df49d38cb428f8cc0047fc91f30892021-11-05T09:21:40ZEffects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films1881-219810.2474/trol.11.203https://doaj.org/article/4c5df49d38cb428f8cc0047fc91f30892016-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/2/11_203/_pdf/-char/enhttps://doaj.org/toc/1881-2198Hydrogenated amorphous carbon (a-C:H) films exhibit excellent friction properties such as high mechanical hardness, high wear resistance, and low friction. a-C:H films have amorphous structures generally composed of sp2- and sp3-hybridized carbon, which bring about extraordinary friction properties. Some reports have focused on the low-friction mechanism of a-C:H films, concluding that it is induced by the existence of graphitized wear particles at the sliding interface. It is possible to consider the existence of graphitized wear particles as the most important factor in achieving the lower friction of a-C:H films. We focus on the effects of surface texture in trapping the graphitized particles at the sliding interface and discuss the role of surface texture with regard to the friction properties of a-C:H films. Micro slurry-jet erosion (MSE) surface machining was employed to manipulate the surface texture on a high-carbon chromium-bearing steel substrate, upon which a-C:H films were deposited. The friction properties of a-C:H films deposited on a mirror-like polished substrate (a-C:H/mirror-like) and on an MSE-produced substrate (a-C:H/MSE-produced) were compared using a reciprocating-type ball-on-disk sliding tester. From the results of friction testing, it is confirmed that a-C:H/MSE-produced films indicated lower friction coefficients compared with the a-C:H/mirror-like case. Scanning electron microscopy (SEM) and Raman spectroscopy were performed to study the friction improvement mechanism of the a-C:H/MSE-produced films. SEM revealed the existence of wear particles in the wear track of a-C:H/MSE-produced films. It is confirmed by Raman spectroscopic analysis that these wear particles’ structure was changed, adopting a graphite-like structure. From these results, it is possible to consider that the existence of graphitized wear particles induced lower shearing resistance at the sliding interface, enabling friction improvement.Yuuki TokutaMasahiro KawaguchiShinya SasakiJapanese Society of Tribologistsarticlehard coatinghydrogenated amorphous carbonsurface texturefrictionPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 2, Pp 203-208 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	hard coating hydrogenated amorphous carbon surface texture friction Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	hard coating hydrogenated amorphous carbon surface texture friction Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Yuuki Tokuta Masahiro Kawaguchi Shinya Sasaki Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
description	Hydrogenated amorphous carbon (a-C:H) films exhibit excellent friction properties such as high mechanical hardness, high wear resistance, and low friction. a-C:H films have amorphous structures generally composed of sp2- and sp3-hybridized carbon, which bring about extraordinary friction properties. Some reports have focused on the low-friction mechanism of a-C:H films, concluding that it is induced by the existence of graphitized wear particles at the sliding interface. It is possible to consider the existence of graphitized wear particles as the most important factor in achieving the lower friction of a-C:H films. We focus on the effects of surface texture in trapping the graphitized particles at the sliding interface and discuss the role of surface texture with regard to the friction properties of a-C:H films. Micro slurry-jet erosion (MSE) surface machining was employed to manipulate the surface texture on a high-carbon chromium-bearing steel substrate, upon which a-C:H films were deposited. The friction properties of a-C:H films deposited on a mirror-like polished substrate (a-C:H/mirror-like) and on an MSE-produced substrate (a-C:H/MSE-produced) were compared using a reciprocating-type ball-on-disk sliding tester. From the results of friction testing, it is confirmed that a-C:H/MSE-produced films indicated lower friction coefficients compared with the a-C:H/mirror-like case. Scanning electron microscopy (SEM) and Raman spectroscopy were performed to study the friction improvement mechanism of the a-C:H/MSE-produced films. SEM revealed the existence of wear particles in the wear track of a-C:H/MSE-produced films. It is confirmed by Raman spectroscopic analysis that these wear particles’ structure was changed, adopting a graphite-like structure. From these results, it is possible to consider that the existence of graphitized wear particles induced lower shearing resistance at the sliding interface, enabling friction improvement.
format	article
author	Yuuki Tokuta Masahiro Kawaguchi Shinya Sasaki
author_facet	Yuuki Tokuta Masahiro Kawaguchi Shinya Sasaki
author_sort	Yuuki Tokuta
title	Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
title_short	Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
title_full	Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
title_fullStr	Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
title_full_unstemmed	Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films
title_sort	effects of surface texture for improving friction properties of hydrogenated amorphous carbon films
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/4c5df49d38cb428f8cc0047fc91f3089
work_keys_str_mv	AT yuukitokuta effectsofsurfacetextureforimprovingfrictionpropertiesofhydrogenatedamorphouscarbonfilms AT masahirokawaguchi effectsofsurfacetextureforimprovingfrictionpropertiesofhydrogenatedamorphouscarbonfilms AT shinyasasaki effectsofsurfacetextureforimprovingfrictionpropertiesofhydrogenatedamorphouscarbonfilms
_version_	1718444407591534592

Effects of Surface Texture for Improving Friction Properties of Hydrogenated Amorphous Carbon Films

Ejemplares similares