한국분말야금학회지 Vol. 24 No. 6 (p.437-443)

|특별주제4: 세라믹 소결 및 특성|
서스펜션 플라즈마 스프레이 코팅법으로 제조된 Ytterbium Silicate 환경차폐코팅의 상형성 및 구조에 미치는 증착인자 및 원료혼합 공정의 영향

Effect of Deposition Parameter and Mixing Process of Raw Materials on the Phase and Structure of Ytterbium Silicate Environmental Barrier Coatings by Suspension Plasma Spray Method
키워드 :
Environmental Barrier Coatings,Ceramic Matrix Composite,Suspension Plasma Spray,Ytterbium Disilicate,SiC

목차

1. 서 론
2. 실험 방법
  2.1. 코팅층 형
  2.2. 코팅층의 특성 분석
3. 결과 및 고찰
4. 결 론
감사의 글
References

초록

SiC-based composite materials with light weight, high durability, and high-temperature stability have been actively studied for use in aerospace and defense applications. Moreover, environmental barrier coating (EBC) technologies using oxide-based ceramic materials have been studied to prevent chemical deterioration at a high temperature of 1300℃ or higher. In this study, an ytterbium silicate material, which has recently been actively studied as an environmental barrier coating because of its high-temperature chemical stability, is fabricated on a sintered SiC substrate. Yb2O3 and SiO2 are used as the raw starting materials to form ytterbium disilicate (Yb2Si2O7). Suspension plasma spraying is applied as the coating method. The effect of the mixing method on the particle size and distribution, which affect the coating formation behavior, is investigated using a scanning electron microscope (SEM), an energy dispersive spectrometer (EDS), and X-ray diffraction (XRD) analysis. It is found that the originally designed compounds are not effectively formed because of the refinement and vaporization of the raw material particles, i.e., SiO2, and the formation of a porous coating structure. By changing the coating parameters such as the deposition distance, it is found that a denser coating structure can be formed at a closer deposition distance.