Liuyang Bai, Gewen Yi, Shanhong Wan, Wenping Li, Liying Xie, Jiyang Wang, Huwei Sun, Peiying Shi, Sang T. Pham
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Effects of feedstock structure and spraying power on microstructure, mechanical and thermal properties of yttria-stabilized zirconia coatings
The influence of spraying power and YSZ (yttria-stabilized zirconia) feedstock powder on coating microstructures and properties has been demonstrated in the case of atmospheric plasma-sprayed YSZ coatings. Two types of YSZ powders, conventional and hollow-structural feedstock, were investigated. Microstructural defects of as-deposited YSZ coatings, such as porosity, interlamellar pores, and intrasplat cracks, were analyzed from the top view and fracture surfaces. Compared to conventional YSZ coating, the YSZ coating produced from hollow-structural feedstock demonstrated distinct features, including high porosity and good mechanical interlocking. However, with an increase in spray power, the porosity of almost all YSZ coatings decreased. Hollow-structured YSZ coating exhibits highly mechanical compliance and lower thermal conductivity as referenced to conventional YSZ coating. The processing parameters of conventional and hollow-structured YSZ coatings were optimized considering the correlations among processes, microstructure features, and properties in combination with adopting optimized feedstock powders, providing opportunities for continuing optimization of thermal barrier YSZ coatings.
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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