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J. Korean Ceram. Soc. > Volume 51(5); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(5): 481.
doi: https://doi.org/10.4191/kcers.2014.51.5.481
분무건조 및 대기 플라즈마 용사에 의한 탄화규소 세라믹스용 내환경 코팅재의 제조 및 평가
풍범걸, 문흥수1, 곽찬원1, 박지연2, 이기성
국민대학교 기계시스템공학부 기계설계전공
1세원하드페이싱 주식회사
2원자력소재개발부 한국원자력연구원
Fabrication and Characterization of Environmental Barrier Coatings by Spray Drying and Atmospheric Plasma Spraying for Protection of Silicon Carbide Ceramics
Fan Jie Feng, Heung Soo Moon1, Chan Won Kwak1, Ji Yeon Park2, Kee Sung Lee
School of Mechanical Systems Engineering, Kookmin University
1Sewon Hardfacing Co. Ltd.
2Nuclear Materials Development Division, Korea Atomic Energy Research Institute
Environmental barrier coatings (EBCs) are used to protect SiC-based ceramics or composites from oxidation and corrosion due to reaction with oxygen and water vapour at high temperatures above $1000^{circ}C$. Mullite ceramics have been studied for environmental barrier coatings for Si-based ceramics. More recently, rare earth silicate ceramics have been identified as more water vapour-resistant materials than mullite for environmental barrier coatings. In this study, we fabricate mullite and yttrium silicate ceramics by an atmospheric plasma spray coating method using spherical granules fabricated by spray drying. As a result, EBCs with thicknesses in the range of $200-300{mu}m$ are successfully fabricated without any macroscopic cracks or interfacial delamination. Phase and microstructure analysis are conducted, and the basic mechanical properties, such as hardness and indentation load-displacement curves are evaluated.
Key words: Environmental barrier coatings, Silicon carbide, Atmospheric plasma spray, Fiber composites
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