Thermal Shock Resistance of Stabilized Zirconia/Metal Coat on Polymer Matrix Composites by Thermal Spraying Process

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• 作者：Ling Zhu (1)
  Wenzhi Huang (2)
  Haifeng Cheng (2)
  Xueqiang Cao (1) (3)
  
• 关键词：failure ; HVOF spray ; polymers ; thermal shock resistance
• 刊名：Journal of Thermal Spray Technology
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：23
• 期：8
• 页码：1312-1322
• 全文大小：3,229 KB
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• 作者单位：Ling Zhu (1)
  Wenzhi Huang (2)
  Haifeng Cheng (2)
  Xueqiang Cao (1) (3)
  
  1. School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, P.R. China
  2. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, 410073, Hunan, P.R. China
  3. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, Jilin, P.R. China
  
• ISSN：1544-1016

文摘

Stabilized zirconia/metal coating systems were deposited on the polymer matrix composites by a combined thermal spray process. Effects of the thicknesses of metal layers and ceramic layer on thermal shock resistance of the coating systems were investigated. According to the results of thermal shock lifetime, the coating system consisting of 20?μm Zn and 125?μm 8YSZ exhibited the best thermal shock resistance. Based on microstructure evolution, failure modes and failure mechanism of the coating systems were proposed. The main failure modes were the formation of vertical cracks and delamination in the outlayer of substrate, and the appearance of coating spallation. The residual stress, thermal stress and oxidation of substrate near the substrate/metal layer interface were responsible for coating failure, while the oxidation of substrate near the substrate/coating interface was the dominant one.