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http://dx.doi.org/10.5695/JKISE.2013.46.6.258

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

Yang, Young-Hwan (Korea Institute of Ceramic Engineering and Technology)
Park, Chan-Young (Korea Institute of Ceramic Engineering and Technology)
Lee, Won-Jun (Korea Institute of Ceramic Engineering and Technology)
Kim, Sun-Joo (Korea Institute of Ceramic Engineering and Technology)
Lee, Sung-Min (Korea Institute of Ceramic Engineering and Technology)
Kim, Seongwon (Korea Institute of Ceramic Engineering and Technology)
Kim, Hyung-Tae (Korea Institute of Ceramic Engineering and Technology)
Oh, Yoon-Suk (Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean institute of surface engineering / v.46, no.6, 2013 , pp. 258-263 More about this Journal
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;
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