Autolubrication of diamond coatings at high sliding speed

Le Huu, T; Paulmier, D; Grabchenko, A; Horvath, M; Meszaros, I; Mamalis, AG

dc.contributor.author	Le Huu, T	en
dc.contributor.author	Paulmier, D	en
dc.contributor.author	Grabchenko, A	en
dc.contributor.author	Horvath, M	en
dc.contributor.author	Meszaros, I	en
dc.contributor.author	Mamalis, AG	en
dc.date.accessioned	2014-03-01T01:13:36Z
dc.date.available	2014-03-01T01:13:36Z
dc.date.issued	1998	en
dc.identifier.issn	0257-8972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12598
dc.subject	Diamond	en
dc.subject	Friction and wear	en
dc.subject	Phase transition	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Friction	en
dc.subject.other	Hardness	en
dc.subject.other	Heat treatment	en
dc.subject.other	Lubrication	en
dc.subject.other	Morphology	en
dc.subject.other	Phase transitions	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Steel	en
dc.subject.other	Tribology	en
dc.subject.other	Tungsten carbide	en
dc.subject.other	Wear of materials	en
dc.subject.other	Diamond coatings	en
dc.subject.other	Diamond films	en
dc.subject.other	diamond coating	en
dc.subject.other	high speed	en
dc.subject.other	lubrication	en
dc.subject.other	sliding contact	en
dc.subject.other	tribology	en
dc.title	Autolubrication of diamond coatings at high sliding speed	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0257-8972(98)00569-6	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0257-8972(98)00569-6	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	We investigated the friction and wear properties of diamond coatings at high sliding speed (V=30 m/s). Various types of diamond coatings were deposited on tungsten carbide pins. These coatings were produced by a combustion flame method under different deposition conditions. The surface properties and morphology of the coatings have been characterised by surface analysis methods, such as scanning electron microscopy (SEM) and Raman spectrometry (RS). The coated pins were tested by sliding against a rotating steel XC30 disc in ambient atmosphere. The hardness of the coated pin and the disc after heat treatment is 70 and 5 GPa, respectively. The experimental results show that at low sliding speed (V=1 m/s) the diamond coatings exhibit a very high friction coefficient of about 0.9-1.1. At high sliding speed (V=30 m/s) the friction coefficient of these films decreases to 0.09-0.15, the wear of the diamond films also decreases. This tribological behaviour of diamond coatings can be explained by the transformation of sp3 to sp2 carbon sites on the rubbing surface during friction at high sliding speed. A model of the friction is proposed to explain this phenomenon.We investigated the friction and wear properties of diamond coatings at high sliding speed (V = 30 m/s). Various types of diamond coatings were deposited on tungsten carbide pins. These coatings were produced by a combustion flame method under different deposition conditions. The surface properties and morphology of the coatings have been characterized by surface analysis methods, such as scanning electron microscopy (SEM) and Raman spectrometry (RS). The coated pins were tested by sliding against a rotating steel XC30 disc in ambient atmosphere. The hardness of the coated pin and the disc after heat treatment is 70 and 5 GPa, respectively. The experimental results show that at low sliding speed (V = 1 m/s) the diamond coatings exhibit a very high friction coefficient of about 0.9-1.1. At high sliding speed (V = 30 m/s) the friction coefficient of these films decreases to 0.09-0.15, the wear of the diamond films also decreases. This tribological behaviour of diamond coatings can be explained by the transformation of sp3 to sp2 carbon sites on the rubbing surface during friction at high sliding speed. A model of the friction is proposed to explain this phenomenon.	en
heal.publisher	Elsevier Science S.A., Lausanne, Switzerland	en
heal.journalName	Surface and Coatings Technology	en
dc.identifier.doi	10.1016/S0257-8972(98)00569-6	en
dc.identifier.isi	ISI:000077203000069	en
dc.identifier.volume	108-109	en
dc.identifier.issue	1-3	en
dc.identifier.spage	431	en
dc.identifier.epage	436	en