Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (46권6호 258-263)

High Temperature Tribology Behavior of 4YSZ Coatings Fabricated by Air Plasma Spray (APS) and Electron Beam Physical Vapor Deposition (EB-PVD)

플라즈마 용사 및 전자빔 물리기상 증착법으로 제조된 4YSZ 코팅의 고온마찰마모 거동

양영환;박찬영;이원준;김선주;이성민;김성원;김형태;오윤석;
Yang, Young-Hwan;Park, Chan-Young;Lee, Won-Jun;Kim, Sun-Joo;Lee, Sung-Min;Kim, Seongwon;Kim, Hyung-Tae;Oh, Yoon-Suk;

한국세라믹기술원 이천분원 엔지니어링세라믹센터;
Korea Institute of Ceramic Engineering and Technology;

DOI : 10.5695/JKISE.2013.46.6.258

Abstract

4 mol% Yttria-stabilized zirconia (4YSZ) coatings are fabricated by Air Plasma Spray (APS) and Electron Beam Physical Vapor Deposition (EB-PVD) with top coating of thermal barrier coating (TBC). NiCrAlY based bond coat is prepared as 150 ${mu}m$ thickness by conventional APS (Air Plasma Spray) method on the NiCrCoAl alloy substrate before deposition of top coating. Each 4YSZ top coating shows different tribological behaviors based on the inherent layer structures. 4YSZ by APS which has splat-stacked structure shows lower friction coefficient but higher wear rate than 4YSZ by EB-PVD which has columnar structure. For 4YSZ by APS, such results are expected due to the sliding wear accompanied with local delamination of splats.

Keywords

Thermal barrier coatings (TBC);4 mol% Yttria-stabilized zirconia (4YSZ);Electron Beam Physical Vapor Deposition (EB-PVD);Air Plasma Spray (APS);Tribology behavior;