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Phase Formation and Thermo-physical Properties of Lanthanum/Gadolinium Zirconate with Reduced Rare-earth Contents for Thermal Barrier Coatings
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 Title & Authors
Phase Formation and Thermo-physical Properties of Lanthanum/Gadolinium Zirconate with Reduced Rare-earth Contents for Thermal Barrier Coatings
Lee, Sujin; Kwon, Chang-Sup; Lee, Sung-Min; Oh, Yoon-Suk; Kim, Hyung-Tae; Nahm, Sahn; Kim, Seongwon;
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 Abstract
Rare-earth zirconates, such as lanthanum zirconates and gadolinium zirconates, have been intensively investigated due to their excellent properties of low thermal conductivity as well as chemical stability at high temperature, which can make these materials ones of the most promising candidates for next-generation thermal barrier coating applications. In this study, three compositions, lanthanum/gadolinium zirconates with reduced rare-earth contents from stoichiometric compositions, are fabricated via solid state reaction as well as sintering at for 4 hrs. The phase formation, microstructure, and thermo-physical properties of three oxide ceramics are examined. In particular, each oxide ceramics exhibits composite structures between pyrochlore and fluorite phases. The potential of lanthanum/gadolinium zirconate ceramics for TBC applications is also discussed.
 Keywords
Thermal barrier coatings (TBCs);Lanthanum/gadolinium zirconate;Phase formation;Thermo-physical properties;
 Language
Korean
 Cited by
1.
서스펜션의 준비방법에 따른 서스펜션 플라즈마 용사를 이용한 La2O3-Gd2O3-ZrO2 계 열차폐코팅의 제조와 특성,이소율;이성민;오윤석;김형태;남산;김성원;

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