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Influence of Ca0.6Mg0.4Zr4(PO4)6 Coating on Alkali Corrosion Resistance of SiC Ceramic

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Abstract:

Ca0.6Mg0.4Zr4(PO4)6 coating was used as environmental barrier coatings (EBC) to improve the alkali corrosion resistance of SiC ceramic at high temperature. A new sol-gel based process has been developed for preparing high quality and thick C0.6M0.4ZP coating on SiC ceramic with once deposition. The prepared C0.6M0.4ZP coating on SiC ceramic is homogeneous and dense, and shows a thickness of about 200 μm when sintered at 1400 °C for 3h. The effectiveness of C0.6M0.4ZP coating in improving the alkali corrosion resistance of SiC ceramic was evaluated based on the SEM microstructural analysis, mass change and flexural strength measurements after being subjected to alkali Na-salt attack at 1000 °C for 96 h. Significantly improved alkali corrosion resistance was confirmed for SiC ceramic using C0.6M0.4ZP coating as EBC.

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Periodical:

Advanced Materials Research (Volumes 105-106)

Pages:

386-389

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.105-106.386

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Online since:

April 2010

Authors:

Jian Er Zhou, Xiao Zhen Zhang, Shi Jiang Peng

Keywords:

Alkali Corrosion Resistance, Ca0.6Mg0.4Zr4(PO4)6, Coating, SiC Ceramic

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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