Effect of the Bond Coating Surface Morphology on Ceramic Splat Construction

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• 作者：Dachuan Li ; Huayu Zhao ; Xinghua Zhong ; Chenguang Liu…
• 关键词：atmospheric plasma spraying ; high ; velocity oxygen ; fuel spraying ; multi ; level roughness ; rough substrate ; splat morphology
• 刊名：Journal of Thermal Spray Technology
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：24
• 期：8
• 页码：1450-1458
• 全文大小：3,696 KB
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• 作者单位：Dachuan Li (1) (2) (3)
  Huayu Zhao (1) (2)
  Xinghua Zhong (1) (2)
  Chenguang Liu (1) (2)
  Liang Wang (1) (2)
  Kai Yang (1) (2)
  Shunyan Tao (1) (2)
  
  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People鈥檚 Republic of China
  2. Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai, 201899, People鈥檚 Republic of China
  3. University of Chinese Academy of Sciences, Beijing, 100049, People鈥檚 Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Surfaces and Interfaces and Thin Films
  Tribology, Corrosion and Coatings
  Materials Science
  Characterization and Evaluation Materials
  Operating Procedures and Materials Treatment
  Analytical Chemistry
  
• 出版者：Springer Boston
• ISSN：1544-1016

文摘

In this work, yttria-stabilized zirconia splats deposited onto different bond coatings were characterized. The influence of both substrate topography and temperature on splat morphologies was investigated. The substrate surface was described using a method characterized by multi-level roughness. On non-heated substrate, the peak-valley structure in scale of micrometer contributed to the formation of crater-like holes on splats. The amount of such holes was reduced with the increase of substrate temperature. It was also observed that on micro-smooth surface, island-like fragments in the center of splat would warp and their edges could be detached from the underlying substrate, especially when the substrate was heated. The obtained results reveal that the influence of substrate pre-heating on the splat formation is realized via thinning the air film near substrate surface. Keywords atmospheric plasma spraying high-velocity oxygen-fuel spraying multi-level roughness rough substrate splat morphology