DOI QR코드

DOI QR Code

서스펜션 플라즈마 용사법을 이용한 La2Zr2O7/YSZ 2층세라믹 열차폐코팅의 제조와 특성평가

권창섭;이수진;이성민;오윤석;김형태;장병국;김성원
Kwon, Chang-Sup;Lee, Sujin;Lee, Sung-Min;Oh, Yoon-Suk;Kim, Hyung-Tae;Jang, Byung-Koog;Kim, Seongwon

  • 투고 : 2015.12.08
  • 심사 : 2015.12.30
  • 발행 : 2015.12.31

초록

Rare-earth zirconates, such as $La_2Zr_2O_7$ and $Gd_2Zr_2O_7$, have been investigated as one of the candidates for replacing conventional yttria-stabilized zirconia (YSZ) for thermal barrier coating (TBC) applications at higher turbine inlet temperatures. In this study, double-ceramic-layer (DCL) TBCs of YSZ 1st layer and $La_2Zr_2O_7$ top coat layer are fabricated by suspension plasma spray with serial liquid feeders. Microstructures, hardness profiles, and thermal durability of DCL-TBCs are also characterized. Fabricated DCL-TBCs of YSZ/$La_2Zr_2O_7$ exhibit excellent properties, such as adhesion strength (>25 MPa) and electrical thermal fatigue (~1429 cycles), which are comparable with TBCs fabricated by atmospheric plasma spray.

키워드

Thermal barrier coatings (TBCs);Double ceramic layer;Rare-earth zirconate;Suspension plasma spray

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피인용 문헌

  1. Phase Formation and Thermal Diffusivity of Thermal Barrier Coatings of La2Zr2O7, (La0.5Gd0.5)2Zr2O7, Gd2Zr2O7Fabricated by Suspension Plasma Spray vol.49, pp.6, 2016, https://doi.org/10.5695/JKISE.2016.49.6.604
  2. Fabrication and Characteristics of Thermal Barrier Coatings in the La2O3-Gd2O3-ZrO2System by Using Suspension Plasma Spray with Different Suspension Preparations vol.49, pp.6, 2016, https://doi.org/10.5695/JKISE.2016.49.6.595

과제정보

연구 과제 주관 기관 : 산업통상자원부