Publication detail
Effect of aging on the onset of cracks due to redistribution of residual stresses in functionally graded environmental barrier coatings of mullite /ZrO2
GUIMARAES, J. GARCIA, E. OSENDI, M. ŠEVEČEK, O. BERMEJO, R.
Czech title
Effect of aging on the onset of cracks due to redistribution of residual stresses in functionally graded environmental barrier coatings of mullite /ZrO2
English title
Effect of aging on the onset of cracks due to redistribution of residual stresses in functionally graded environmental barrier coatings of mullite /ZrO2
Type
journal article in Web of Science
Language
en
Original abstract
In present work, three types of environmental barrier coatings fabricated by air plasma spray and containing a Si layer attached to SiC substrate plus 2 to 5 layers of different mullite/Y-ZrO2 mixtures are examined. To determine the level of residual stresses in the as-prayed coating/substrate systems a three dimensional finite element model is developed and also tested for same coatings but aged under high temperature and rich water vapor atmosphere. The model calculates the zones of maximum tensile stresses in the coatings which agree with experimental observation identifying the type, number and location of cracks.
Czech abstract
In present work, three types of environmental barrier coatings fabricated by air plasma spray and containing a Si layer attached to SiC substrate plus 2 to 5 layers of different mullite/Y-ZrO2 mixtures are examined. To determine the level of residual stresses in the as-prayed coating/substrate systems a three dimensional finite element model is developed and also tested for same coatings but aged under high temperature and rich water vapor atmosphere. The model calculates the zones of maximum tensile stresses in the coatings which agree with experimental observation identifying the type, number and location of cracks.
English abstract
In present work, three types of environmental barrier coatings fabricated by air plasma spray and containing a Si layer attached to SiC substrate plus 2 to 5 layers of different mullite/Y-ZrO2 mixtures are examined. To determine the level of residual stresses in the as-prayed coating/substrate systems a three dimensional finite element model is developed and also tested for same coatings but aged under high temperature and rich water vapor atmosphere. The model calculates the zones of maximum tensile stresses in the coatings which agree with experimental observation identifying the type, number and location of cracks.
Keywords in Czech
Layered structures, Residual/internal stress, Finite element analysis (FEA), Fractography, Lay-up (manual/automated)
Keywords in English
Layered structures, Residual/internal stress, Finite element analysis (FEA), Fractography, Lay-up (manual/automated)
RIV year
2014
Released
30.01.2014
Publisher
Elsevier
Location
Velká Británie
ISSN
1359-8368
Volume
2014
Number
61
Pages from–to
199–205
Pages count
7
BIBTEX
@article{BUT105614,
author="Joana Mesquita {Guimaraes} and Eugenio {Garcia} and Maria Isabel {Osendi} and Oldřich {Ševeček} and Raul {Bermejo},
title="Effect of aging on the onset of cracks due to redistribution of residual stresses in functionally graded environmental barrier coatings of mullite /ZrO2",
year="2014",
volume="2014",
number="61",
month="January",
pages="199--205",
publisher="Elsevier",
address="Velká Británie",
issn="1359-8368"
}