Abstract No.:	1107
Title:	Effects of heat treatment on properties of plasma spray NiAl coatings
Authors:	Mehrshad Moshref Javadi* / Istahan University of Technology (IUT), Iran Hosein Edris / iut university, Iran Mehdi Salehi/ iut university, Iran
Abstract:	For production of intermetallic coatings, various types of Ni-Al powders were plasma sprayed at different spray distance and the effect of heat treatment on phases, microstructures and microhardness of coatings was examined. XRD, SEM, EDAX and microhardness were used for characterization of the coatings. Heat treatment of the coatings in various temperatures caused changes in hardness of the coating, increased percentage of intermetallic compounds, completed intermetallic production reactions and does not change porosity percent. Increasing of heat treatment temperature caused oxidation and decreased improvement of coating properties.

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