Effect of annealing on the structure and hardness of Ni-P-W multilayered alloy coatings produced by pulse plating

Papachristos, VD; Panagopoulos, CN; Wahlstrom, U; Christoffersen, LW; Leisner, P

dc.contributor.author	Papachristos, VD	en
dc.contributor.author	Panagopoulos, CN	en
dc.contributor.author	Wahlstrom, U	en
dc.contributor.author	Christoffersen, LW	en
dc.contributor.author	Leisner, P	en
dc.date.accessioned	2014-03-01T01:15:34Z
dc.date.available	2014-03-01T01:15:34Z
dc.date.issued	2000	en
dc.identifier.issn	0921-5093	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13593
dc.subject	coatings	en
dc.subject	multilayer	en
dc.subject	Ni-P-W	en
dc.subject	annealing	en
dc.subject	hardness	en
dc.subject.classification	Nanoscience & Nanotechnology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	THIN-FILMS	en
dc.subject.other	THERMAL-STABILITY	en
dc.subject.other	CRYSTALLIZATION	en
dc.subject.other	GROWTH	en
dc.title	Effect of annealing on the structure and hardness of Ni-P-W multilayered alloy coatings produced by pulse plating	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0921-5093(99)00583-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0921-5093(99)00583-3	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Ni-P-W multilayered alloy coatings were deposited on copper foils by pulse plating, using a rotating cylinder electrode. They consisted of layers of high (Ni-5 wt.% P-35 wt.% W) and low (Ni-8 wt.% P-15 wt.% W) W content. The wavelengths studied were 8, 40 and 300 nm and the total thickness of the coatings was approximately 25 mu m. The multilayered coatings were annealed in the temperature range between 200 and 800 degrees C and the effect of annealing on their structure was studied by using X-ray diffraction, cross-sectional transmission electron microscopy equipped:with selected area electron diffraction facility, and differential thermal analysis. The initially amorphous multilayered coatings crystallise in steps as the annealing temperature increases (first the low-W crystallise layers and then the high-W layers), and the layered structure is lost around 600 degrees C. The main crystalline phases formed during annealing are Ni-W solid solution and Ni3P. The wavelength of the coatings seems to affect the onset temperature of the crystallisation processes. The hardness of the coatings initially increases reaching a maximum in the 500-600 degrees C range, and then decreases as the annealing temperature increases. (C) 2000 Elsevier Science S.A. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING	en
dc.identifier.doi	10.1016/S0921-5093(99)00583-3	en
dc.identifier.isi	ISI:000085069200027	en
dc.identifier.volume	279	en
dc.identifier.issue	1-2	en
dc.identifier.spage	217	en
dc.identifier.epage	230	en