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

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


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.


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,
  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,


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