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http://dx.doi.org/10.5695/JKISE.2016.49.6.604

Phase Formation and Thermal Diffusivity of Thermal Barrier Coatings of La2Zr2O7, (La0.5Gd0.5)2Zr2O7, Gd2Zr2O7 Fabricated by Suspension Plasma Spray  

Kim, Sun-Joo (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
Lee, Sung-Min (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
Oh, Yoon-Suk (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
Kim, Hyung-Tae (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
Jang, Byung-Koog (Research Center for Structural Materials, National Institute for Materials)
Kim, Seongwon (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean institute of surface engineering / v.49, no.6, 2016 , pp. 604-611 More about this Journal
Abstract
In order to comply with demand for high efficient gas turbines operating at higher temperatures, considerable amounts of research efforts have been performed with searching for the next-generation thermal barrier coatings (TBCs) with respect to coating materials as well as processing methods. In this study, thermal barrier coatings in the $(La_{1-x}Gd_x)_2Zr_2O_7$ system, which is one of the most versatile materials replacing yttria-stabilized zirconia (YSZ), are fabricated by suspension plasma spray with suspension made of synthesized powders via solidstate reaction. Dense, $100{\sim}400{\mu}m$ thick coatings of fluorite-phase zirconate with moderate amount of segmented microstructures are obtained by using suspension plasma spray. Phase formation and thermal diffusivity are characterized with coating compositions. The feasibility of $(La_{1-x}Gd_x)_2Zr_2O_7$ coatings for TBC applications is also discussed.
Keywords
Thermal barrier coatings (TBCs); Lanthanum/gadolinium zirconate; Suspension plasma spray; Phase formation; Thermal property;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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