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Title

Nickel–alumina graded coatings obtained by dipping and EPD on nickel substrates

AuthorsFerrari-Fernández, Begoña ; Sánchez Herencia, Antonio Javier; Moreno Botella, Rodrigo María
KeywordsShaping
Suspensions
Issue Date2006
PublisherElsevier
CitationJournal of the European Ceramic Society 26 (2006) 2205–2212
AbstractNickel substrates have been coated by Ni/Al2O3 composite films by a dipping process using aqueous suspensions that contain a temporary binder. Two-layer and three-layer graded coatings have been produced, consisting of pure Ni powder and Ni/Al2O3 composites with Al2O3 contents of 15 and 30 vol.% as intermediate layers to release sintering and thermal stresses. The laminates were further coated with a ceramic layer of Al2O3/ZrO2 that was deposited by electrophoretic deposition using a non-aqueous suspension. A continuous, thin Al2O3 layer surrounding Ni grains developed at the intermediate composite layer of Ni/Al2O3 allows the ceramic coating to maintain strongly adhered to the nickel substrate by means of a porous substrate/coating interface.
Publisher version (URL)http://dx.doi.org/10.1016/j.jeurceramsoc.2005.04.009
URIhttp://hdl.handle.net/10261/20625
DOI10.1016/j.jeurceramsoc.2005.04.009
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