Method of Applying DLC Coating on Aluminum Alloys

A method was developed for applying a diamond-like carbon (DLC) coating on aluminum alloys to obtain sufficient adhesion strength and wear resistance. The key points of this technology consist of two main processes. First, the surface of the aluminum substrate is modified by forming a top layer of d...

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Autores principales:	Takahiro Horiuchi, Makoto Kano, Kentaro Yoshida, Masao Kumagai, Tetsuya Suzuki
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2010
Materias:	diamond-like carbon shot-peening aluminum tungsten sliding test 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/0eeb0e4a3e244ed1bbf9a47d57936c15
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spelling	oai:doaj.org-article:0eeb0e4a3e244ed1bbf9a47d57936c152021-11-05T09:27:04ZMethod of Applying DLC Coating on Aluminum Alloys1881-219810.2474/trol.5.136https://doaj.org/article/0eeb0e4a3e244ed1bbf9a47d57936c152010-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/5/3/5_3_136/_pdf/-char/enhttps://doaj.org/toc/1881-2198A method was developed for applying a diamond-like carbon (DLC) coating on aluminum alloys to obtain sufficient adhesion strength and wear resistance. The key points of this technology consist of two main processes. First, the surface of the aluminum substrate is modified by forming a top layer of dispersed fine tungsten particles on a mechanically hardened layer obtained in a fine tungsten particle shot-peening process. Second, the sharp top edges formed by the shot-peening process are polished lightly to remove them. A DLC film is then coated on the aluminum substrate by plasma chemical vapor deposition (PE-CVD). The adhesion strength and wear resistance of the DLC film were evaluated in sliding tests under a continuously increasing load. The critical load, which was defined as the load where the friction coefficient increased markedly, was compared for three types of DLC-coated samples. One sample had the DLC film coated directly on the smooth surface of aluminum substrate after polishing; another had the DLC film coated on the rough surface following tungsten shot-peening; the third had the DLC film coated on the substrate surface with plateau roughness obtained by polishing the top edges lightly after the shot-peening process. The critical load of the DLC coating on the substrate with light polishing after the tungsten shot-peening process was 40-70% higher than that of the coating on the polished substrate, while that of the coating on the substrate subjected only to tungsten shot-peening was markedly lower.Takahiro HoriuchiMakoto KanoKentaro YoshidaMasao KumagaiTetsuya SuzukiJapanese Society of Tribologistsarticlediamond-like carbonshot-peeningaluminumtungstensliding testPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 5, Iss 3, Pp 136-143 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	diamond-like carbon shot-peening aluminum tungsten sliding test Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	diamond-like carbon shot-peening aluminum tungsten sliding test Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Takahiro Horiuchi Makoto Kano Kentaro Yoshida Masao Kumagai Tetsuya Suzuki Method of Applying DLC Coating on Aluminum Alloys
description	A method was developed for applying a diamond-like carbon (DLC) coating on aluminum alloys to obtain sufficient adhesion strength and wear resistance. The key points of this technology consist of two main processes. First, the surface of the aluminum substrate is modified by forming a top layer of dispersed fine tungsten particles on a mechanically hardened layer obtained in a fine tungsten particle shot-peening process. Second, the sharp top edges formed by the shot-peening process are polished lightly to remove them. A DLC film is then coated on the aluminum substrate by plasma chemical vapor deposition (PE-CVD). The adhesion strength and wear resistance of the DLC film were evaluated in sliding tests under a continuously increasing load. The critical load, which was defined as the load where the friction coefficient increased markedly, was compared for three types of DLC-coated samples. One sample had the DLC film coated directly on the smooth surface of aluminum substrate after polishing; another had the DLC film coated on the rough surface following tungsten shot-peening; the third had the DLC film coated on the substrate surface with plateau roughness obtained by polishing the top edges lightly after the shot-peening process. The critical load of the DLC coating on the substrate with light polishing after the tungsten shot-peening process was 40-70% higher than that of the coating on the polished substrate, while that of the coating on the substrate subjected only to tungsten shot-peening was markedly lower.
format	article
author	Takahiro Horiuchi Makoto Kano Kentaro Yoshida Masao Kumagai Tetsuya Suzuki
author_facet	Takahiro Horiuchi Makoto Kano Kentaro Yoshida Masao Kumagai Tetsuya Suzuki
author_sort	Takahiro Horiuchi
title	Method of Applying DLC Coating on Aluminum Alloys
title_short	Method of Applying DLC Coating on Aluminum Alloys
title_full	Method of Applying DLC Coating on Aluminum Alloys
title_fullStr	Method of Applying DLC Coating on Aluminum Alloys
title_full_unstemmed	Method of Applying DLC Coating on Aluminum Alloys
title_sort	method of applying dlc coating on aluminum alloys
publisher	Japanese Society of Tribologists
publishDate	2010
url	https://doaj.org/article/0eeb0e4a3e244ed1bbf9a47d57936c15
work_keys_str_mv	AT takahirohoriuchi methodofapplyingdlccoatingonaluminumalloys AT makotokano methodofapplyingdlccoatingonaluminumalloys AT kentaroyoshida methodofapplyingdlccoatingonaluminumalloys AT masaokumagai methodofapplyingdlccoatingonaluminumalloys AT tetsuyasuzuki methodofapplyingdlccoatingonaluminumalloys
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Method of Applying DLC Coating on Aluminum Alloys

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