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Published in: Journal of Materials Science 4/2019

31-10-2018 | Ceramics

In situ observation and strain distribution measurements of atmospheric plasma-sprayed mullite and Si multilayered coatings on SiC substrates

Authors: Ryo Inoue, Yutaro Arai, Hideki Kakisawa

Published in: Journal of Materials Science | Issue 4/2019

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Abstract

A mullite/Si multilayer coating was deposited on a SiC substrate using atmospheric plasma spraying. Mud cracking of the protective surface mullite layer was examined using a high-temperature observation system (HTOS). In-plane surface strain distributions were also measured using the digital image correlation (DIC) method. The experimental results showed that mud cracks nucleated in the mullite layer during heating, primarily due to shrinkage of the mullite during crystallization. The cracking event was detectable by mapping the maximum principal strain distribution. We clearly demonstrated that HTOS and DIC are effective tools for investigating the degradation mechanisms of thick coatings at high temperatures.

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Appendix
Available only for authorised users
Literature
24.
go back to reference Inoue R, Chikamoto K, Kogo Y, Kakisawa H (2017) Effect of heat exposure on the microstructures and mechanical properties of 3Al2O3 2SiO2/Si/SiC coating system. Wiley-Blackwell, Hoboken, NJ, pp 443–450 Inoue R, Chikamoto K, Kogo Y, Kakisawa H (2017) Effect of heat exposure on the microstructures and mechanical properties of 3Al2O3 2SiO2/Si/SiC coating system. Wiley-Blackwell, Hoboken, NJ, pp 443–450
Metadata
Title
In situ observation and strain distribution measurements of atmospheric plasma-sprayed mullite and Si multilayered coatings on SiC substrates
Authors
Ryo Inoue
Yutaro Arai
Hideki Kakisawa
Publication date
31-10-2018
Publisher
Springer US
Published in
Journal of Materials Science / Issue 4/2019
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-3080-z

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