Characterization of oxide scales formed on HVOFNiCrAlY coatings with various oxygen contents introduced during thermal spraying

NiCrAlY coatings with oxygen contents ranging from 3 to 21 at.% introduced during HVOF spraying were prepared. Oxidation tests at 1000 degreesC for up to 1000 h showed that the composition and microstructure of the oxide scale formed on the coatings were significantly affected by the oxygen content in the coatings. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.