Preparation of Suspension in La2O3-Gd2O3-ZrO2 System via Planetary Mill and Characteristics of (La1-xGdx)2Zr2O7 Coatings Fabricated via Suspension Plasma Spray

Chang-Sup Kwon; Sung-Min Lee; Yoon-Suk Oh; Hyung-Tae Kim; Byung-Koog Jang; Seongwon Kim

doi:10.4150/KPMI.2013.20.6.453

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유성구볼밀을 이용한 La₂O₃-Gd₂O₃-ZrO₂ 계 서스펜션준비와 서스펜션 플라즈마용사를 이용한 (La_1-xGd_x)₂Zr₂O₇ 코팅증착과 특성: 권창섭, 이성민, 오윤석, 김형태, 장병국, 김성원
Preparation of Suspension in La₂O₃-Gd₂O₃-ZrO₂ System via Planetary Mill and Characteristics of (La_1-xGd_x)₂Zr₂O₇ Coatings Fabricated via Suspension Plasma Spray: Chang-Sup Kwon, Sung-Min Lee, Yoon-Suk Oh, Hyung-Tae Kim, Byung-Koog Jang, Seongwon Kim; Journal of Korean Powder Metallurgy Institute 2013;20(6):453-459
DOI: https://doi.org/10.4150/KPMI.2013.20.6.453

¹한국세라믹기술원 엔지니어링세라믹센터
²한국세라믹기술원 엔지니어링세라믹센터
³한국세라믹기술원 엔지니어링세라믹센터
⁴한국세라믹기술원 엔지니어링세라믹센터
⁵물질.재료연구기구 (NIMS) 선진고온재료유닛트
⁶한국세라믹기술원 엔지니어링세라믹센터
¹Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
²Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
³Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
⁴Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
⁵High Temperature Materials Unit, National Institute for Materials Science
⁶Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology

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Abstract

Lanthanum/gadolinium zirconate coatings are deposited via suspension plasma spray with suspensions fabricated by a planetary mill and compared with hot-pressed samples via solid-state reaction. With increase in processing time of the planetary mill, the mean size and BET surface area change rapidly in the case of lanthanum oxide powder. By using suspensions of planetary-milled mixture between lanthanum or gadolinium oxide and nano zirconia, dense thick coatings with fully-developed pyrochlore phases are obtained. The possibilities of these SPS-prepared coatings for TBC application are also discussed.

Keywords: Thermal barrier coatings;Suspension plasma spray;Rare-earth zirconate;Pyrochlore;Microstructure;

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Phase Equilibria in the ZrO2–La2O3–Gd2O3 System at 1600°C
E.R. Andrievskaya, O.A. Kornienko, A.I. Bykov, A.V. Sameliuk
Powder Metallurgy and Metal Ceramics.2020; 58(11-12): 714. CrossRef
Characteristics of Bulk and Coating in Gd2−xZr2+xO7+0.5x(x = 0.0, 0.5, 1.0) System for Thermal Barrier Coatings
Sun-Joo Kim, Sung-Min Lee, Yoon-Suk Oh, Hyung-Tae Kim, Byung-Koog Jang, Seongwon Kim
Journal of the Korean Ceramic Society.2016; 53(6): 652. CrossRef
Fabrication and Characterization of Ceramics and Thermal Barrier Coatings of Lanthanum Zirconate with Reduced Rare-earth Contents in the La2O3-ZrO2 System
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Journal of Korean Powder Metallurgy Institute.2015; 22(6): 413. CrossRef
Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray
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