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Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray
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 Title & Authors
Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray
Kwon, Chang-Sup; Lee, Sung-Min; Oh, Yoon-Suk; Kim, Hyung-Tae; Jang, Byung-Koog; Kim, Seongwon;
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 Abstract
With increase in demand for higher operating temperatures of gas turbines, extensive research efforts have been carried out to enhance the performance of thermal barrier coatings (TBCs) in the field of coating processing as well as materials. In this study, thermal barrier coatings in lanthanum/gadolinium zirconate system, which is one of the most promising candidates for replacing yttira-stabilized zirconia (YSZ) in thermal barrier coating applications, are fabricated via suspension plasma spray. Dense, thick coatings of fluoritephase zirconate with modest amount of segmented microstructures are obtained by using suspension plasma spray with suspensions of planetary-milled mixture between lanthanum and/or gadolinium oxide and nano zirconia. These coatings exhibit thermal conductivities of 1.6 ~ 1.7 W/mK at , which is relatively lower than that of YSZ.
 Keywords
Thermal barrier coatings;Suspension plasma spray;Rare-earth zirconate;Phase formation;Thermal conductivity;
 Language
Korean
 Cited by
1.
서스펜션 플라즈마 용사법을 이용한 La2Zr2O7/YSZ 2층세라믹 열차폐코팅의 제조와 특성평가,권창섭;이수진;이성민;오윤석;김형태;장병국;김성원;

한국표면공학회지, 2015. vol.48. 6, pp.315-321 crossref(new window)
1.
Fabrication and Characterization of La2Zr2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings Fabricated by Suspension Plasma Spray, Journal of the Korean institute of surface engineering, 2015, 48, 6, 315  crossref(new windwow)
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