Authors: E Garcia J MesquitaGuimarães P Miranzo M I Osendi C V Cojocaru Y Wang C Moreau R S Lima
Publish Date: 2010/11/13
Volume: 20, Issue: 1-2, Pages: 83-91
Abstract
Mullitebased systems have been considered as environmental barrier coatings EBCs for high temperature protection of Sibased ceramic Si3N4 SiC substrates against water vapor corrosion for application in forthcoming turbine engines Graded mullite/YZrO2 composites plasma sprayed over Hexoloy SiC substrates were analyzed as EBCs All feedstock materials were purposely prepared and singular spraying conditions were used to assure superior crystallization The different coated specimens were subjected to temperatures of 1300 °C for 100500 h under water vapor environment The effect of water corrosion on the exposed coatings was investigated by focusing on their phase and microstructure changesThis article is an invited paper selected from presentations at the 2010 International Thermal Spray Conference and has been expanded from the original presentation It is simultaneously published in Thermal Spray Global Solutions for Future Applications Proceedings of the 2010 International Thermal Spray Conference Singapore May 35 2010 Basil R Marple Arvind Agarwal Margaret M Hyland YukChiu Lau ChangJiu Li Rogerio S Lima and Ghislain Montavon Ed ASM International Materials Park OH 2011This study has been supported by NRCCSIC program project 2007CA003 and MICINN Ministry of Science and Innovation Spain under projects MAT200607118 and MAT200909600 One of the authors Eugenio Garcia acknowledges the Ramón y Cajal Program MICINN for the financial support
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