Mechanical Properties and Dissolution Behavior of Plasma Sprayed Wollastonite Coatings Deposited at Different Substrate Temperatures

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• 作者：Weize Wang (1) wangwz@ecust.edu.cn
  Jiachun Liang (1)
  Xueping Guo (2)
  Fuzhen Xuan (1)
  Huoxing Hong (1)
• 关键词：Key words atmospheric plasma spraying – dissolution behavior – mechanical properties – substrate temperature – wollastonite coatings
• 刊名：Journal of Thermal Spray Technology
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：21
• 期：3-4
• 页码：496-504
• 全文大小：669.8 KB
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• 作者单位：1. Key Lab of Safety Science of Pressurized System, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237 People’s Republic of China2. Marine Engineering college, Dalian Maritime University, Dalian, 116026 People’s 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

The effect of substrate temperature on the microstructure, mechanical properties and dissolution behavior of wollastonite coatings is investigated. The crystallinity of as-deposited coatings increases with increasing substrate temperature, whereas the porosity shows only a little variable tendency. The Knoop hardness and elastic modulus increase with the substrate temperature up to 400 °C firstly, and then a decrement is observed with the temperature further increasing to 600 °C. The dissolution rate characterized by the pH changes and the ion concentration changes of Ca, Si and P in SBF decreases with the increase in the substrate temperature. It can be concluded that increasing the substrate temperature is a feasible method to improve the mechanical properties and to decrease the dissolution rate of wollastonite coatings. However, the bioactivity of coatings deposited on preheated substrates is superior to those on non-preheated ones, which presumably results from their different phase compositions.