A TiB2 metal matrix composite coating enriched with nitrogen: Microstructure and wear properties

Darabara, M; Bourithis, L; Diplas, S; Papadimitriou, GD

dc.contributor.author	Darabara, M	en
dc.contributor.author	Bourithis, L	en
dc.contributor.author	Diplas, S	en
dc.contributor.author	Papadimitriou, GD	en
dc.date.accessioned	2014-03-01T01:27:48Z
dc.date.available	2014-03-01T01:27:48Z
dc.date.issued	2008	en
dc.identifier.issn	0169-4332	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18585
dc.subject	Metal matrix composite (MMC)	en
dc.subject	Plasma transferred arc (PTA)	en
dc.subject	Titanium carbonitride Ti(C,N)	en
dc.subject	Titanium diboride (TiB2)	en
dc.subject	Wear	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Corrosion	en
dc.subject.other	Microstructure	en
dc.subject.other	Wear of materials	en
dc.subject.other	Metal matrix composites	en
dc.subject.other	Plasma transferred arc (PTA)	en
dc.subject.other	Titanium carbonitride	en
dc.subject.other	Titanium diboride	en
dc.subject.other	Composite coatings	en
dc.title	A TiB2 metal matrix composite coating enriched with nitrogen: Microstructure and wear properties	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apsusc.2007.12.044	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apsusc.2007.12.044	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Metal matrix composites containing titanium nitrides or titanium borides raise great interest to researchers due to their high wear resistance and enhanced corrosion properties. In the present investigation composite coatings containing both titanium nitrides/carbonitrides and titanium diborides were produced on plain steel substrates using the plasma transferred arc ( PTA) technique with argon-nitrogen mixtures in the plasma and shielding gas. The microstructure of the metal matrix composites (MMC) obtained was thoroughly studied and found to consist of primary titanium diboride particles surrounded by a eutectic matrix containing, apart from ferrite, both titanium diboride and titanium carbonitride particles. The wear behavior of the composite coatings was assessed by pin on disk experiments. The wear rate against both a tool steel counterbody and an alumina counterbody is of the order of 10(-4) mm(3)/m. The friction coefficient for both the alloyed layer-tool steel system and the alloyed layer-alumina system increases up to sliding speed of 0.30 m/s and then decreases, when the sliding speed increases further. Specifically, the friction coefficients are varied between the values 0.5 and 0.65. The wear mechanism for the tribosystem alloyed layer-tool steel is characterized by plastic deformation and adherence of material coming from the alloyed layer to the surface of the ball, while for the tribosystem alloyed layer-alumina ball, severe plastic deformation and formation of oxide layer are observed. (C) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Applied Surface Science	en
dc.identifier.doi	10.1016/j.apsusc.2007.12.044	en
dc.identifier.isi	ISI:000255344500064	en
dc.identifier.volume	254	en
dc.identifier.issue	13	en
dc.identifier.spage	4144	en
dc.identifier.epage	4149	en