Sliding wear behaviour of Ni-P-W composition-modulated coatings

Papachristos, VD; Panagopoulos, CN; Leisner, P; Olsen, MB; Wahlstrom, U

dc.contributor.author	Papachristos, VD	en
dc.contributor.author	Panagopoulos, CN	en
dc.contributor.author	Leisner, P	en
dc.contributor.author	Olsen, MB	en
dc.contributor.author	Wahlstrom, U	en
dc.date.accessioned	2014-03-01T01:14:10Z
dc.date.available	2014-03-01T01:14:10Z
dc.date.issued	1998	en
dc.identifier.issn	0257-8972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12899
dc.subject	composition-modulated coatings	en
dc.subject	Ni-P-W	en
dc.subject	sliding wear behaviour	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Brittle fracture	en
dc.subject.other	Delamination	en
dc.subject.other	Friction	en
dc.subject.other	Interfaces (materials)	en
dc.subject.other	Materials testing	en
dc.subject.other	Multilayers	en
dc.subject.other	Nickel alloys	en
dc.subject.other	Steel	en
dc.subject.other	Wear of materials	en
dc.subject.other	Wear resistance	en
dc.subject.other	Composition modulated coatings	en
dc.subject.other	Crack deflection	en
dc.subject.other	Friction coefficient	en
dc.subject.other	Hardened steel disc	en
dc.subject.other	Mild steel pin	en
dc.subject.other	Nickel phosphorus tungsten alloy	en
dc.subject.other	Pin on disc set up	en
dc.subject.other	Sliding wear behavior	en
dc.subject.other	Coatings	en
dc.subject.other	coating	en
dc.subject.other	sliding wear	en
dc.subject.other	unlubricated friction	en
dc.title	Sliding wear behaviour of Ni-P-W composition-modulated coatings	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0257-8972(98)00459-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0257-8972(98)00459-9	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	We studied the unlubricated sliding wear behaviour of Ni-P-W compositionally modulated coatings on mild steel pins, sliding against hardened steel discs in a pin-on-disc set-up. The multilayered coatings consisted of high and low W-content layers. The linear velocity was constant for all tests, and the normal loads used were 200, 500, 800 and 1100 g. Coatings of various layer periodicities were studied. Friction coefficients were recorded during the tests, and it was found that after a running-in period of about 30 m, friction coefficients reached a steady state. An increase in the normal load caused a decrease in friction coefficients regardless of the layer periodicity of the coating. Coatings with a smaller layer periodicity showed a better wear resistance than those with larger layer perodicities. Two major wear mechanisms were identified: brittle fracture of the individual layers accompanied by crack deflection at the interfaces between the layers and delamination of parts of the coating. The first mechanism was active for the whole range of loads, whereas the second was operative only for loads of 800 and 1100 g.We studied the unlubricated sliding wear behaviour of Ni-P-W compositionally modulated coatings on mild steel pins, sliding against hardened steel discs in a pin-on-disc set-up. The multilayered coatings consisted of high and low W-content layers. The linear velocity was constant for all tests, and the normal loads used were 200, 500, 800 and 1100 g. Coatings of various layer periodicities were studied. Friction coefficients were recorded during the tests, and it was found that after a running-in period of about 30 m, friction coefficients reached a steady state. An increase in the normal load caused a decrease in friction coefficients regardless of the layer periodicity of the coating. Coatings with a smaller layer periodicity showed a better wear resistance than those with larger layer periodicities. Two major wear mechanisms were identified: brittle fracture of the individual layers accompanied by crack deflection at the interfaces between the layers and delamination of parts of the coating. The first mechanism was active for the whole range of loads, whereas the second was operative only for loads of 800 and 1100 g.	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)00459-9	en
dc.identifier.isi	ISI:000074733400008	en
dc.identifier.volume	105	en
dc.identifier.issue	3	en
dc.identifier.spage	224	en
dc.identifier.epage	231	en