COMPARISON OF THERMAL SHOCK BEHAVIOR OF 7YSZ, 15YSZ AND SYSZ THERMAL BARRIER COATINGS PRODUCED BY APS METHOD

H. Jamali; M.R. Loghman-Estarki; Shoja Razavi R.; Mozafarinia R.; Edris H.; Bakhshi S. R.

doi:10.13168/cs.2016.0032

Ceramics-Silikáty (Jul 2016)

COMPARISON OF THERMAL SHOCK BEHAVIOR OF 7YSZ, 15YSZ AND SYSZ THERMAL BARRIER COATINGS PRODUCED BY APS METHOD

H. Jamali,
M.R. Loghman-Estarki,
Shoja Razavi R.,
Mozafarinia R.,
Edris H.,
Bakhshi S. R.

Affiliations

H. Jamali: Department of Materials Engineering, Isfahan University of Technology, Isfahan , P. O. Box. 84156-83111, I. R. Iran
M.R. Loghman-Estarki: Department of Materials Engineering, Isfahan University of Technology, Isfahan , P. O. Box. 84156-83111, I. R. Iran
Shoja Razavi R.: Department of Materials Engineering, Isfahan University of Technology, Isfahan , P. O. Box. 84156-83111, I. R. Iran
Mozafarinia R.: Department of Materials Engineering, Isfahan University of Technology, Isfahan , P. O. Box. 84156-83111, I. R. Iran
Edris H.
Bakhshi S. R.: Department of Materials Engineering, Isfahan University of Technology, Isfahan , P. O. Box. 84156-83111, I. R. Iran

DOI: https://doi.org/10.13168/cs.2016.0032
Journal volume & issue: Vol. 60, no. 3
pp. 210 – 219

Abstract

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Nanostructured scandia, yttria doped zirconia (SYSZ), 7wt. % yttria stabilized zirconia (7YSZ) and 15YSZ thermal barrier coatings (TBCs) were produced by plasma spraying on nickel-based superalloy substrates with NiCrAlY as the bond coat. The thermal shock behavior of the three as-sprayed TBCs at 1000 °C was investigated. The results indicated that the thermal cycling lifetime of SYSZ and 7YSZ TBCs was longer than the 15YSZ TBCs due to the lower thermal mismatch stress between the ceramic layer and the metallic layer at high temperature and higher amount of tetragonal phase.

Published in Ceramics-Silikáty

ISSN: 0862-5468 (Print); 1804-5847 (Online)
Publisher: University of Chemistry and Technology, Prague
Country of publisher: Czechia
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: http://www.ceramics-silikaty.cz/

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