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Title: DEGRADATION OF SM2ZR2O7 THERMAL BARRIER COATING CAUSED BY CALCIUM-MAGNESIUM-ALUMINUM-SILICON OXIDE (CMAS) DEPOSITION

Rare earth zirconates are promising materials for use as thermal barrier coatings in gas turbine engines. Among the lanthanide zirconate materials, Sm2Zr2O7 with the pyrochlore structure has lower thermal conductivity and better corrosion resistance against calcium-magnesium-aluminum-silicon oxide (CMAS). In this work, after reaction with CMAS, the pyrochlore structure transforms to the cubic fluorite structure and Ca2Sm8(SiO4)6O2 forms in elongated grain.
Authors:
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Publication Date:
OSTI Identifier:
1179000
DOE Contract Number:
FE0011245
Resource Type:
Conference
Resource Relation:
Journal Name: Energy Technology 2015: Carbon Dioxide Management and Other Technologies; Conference: TMS Annual Meeting, Orlando, FL, 16-19 March 2015
Research Org:
Auburn University
Sponsoring Org:
USDOE Office of Fossil Energy (FE), Clean Coal and Carbon (FE-20)
Contributing Orgs:
Auburn University
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE