Residual Stresses in Microarc Oxidation Ceramic Coatings on Biocompatible AZ31 Magnesium Alloys

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• 作者：Yanhong Gu (1)
  Wenming Xiong (2)
  Chengyun Ning (2)
  Jing Zhang (1) jzhang6@alaska.edu
• 关键词：magnesium alloy – ; microarc oxidation – ; residual stresses – ; x ; ray diffraction
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：21
• 期：6
• 页码：1085-1090
• 全文大小：646.6 KB
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• 作者单位：1. Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA2. College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 People鈥檚 Republic of China
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Characterization and Evaluation Materials
  Materials Science
  Tribology, Corrosion and Coatings
  Quality Control, Reliability, Safety and Risk
  Engineering Design
  
• 出版者：Springer New York
• ISSN：1544-1024

文摘

Ceramic coatings have been successfully prepared on biocompatible AZ31 magnesium alloy substrates using microarc oxidation (MAO) technique. Residual stresses attributed to the MgO constituent of the coatings at different oxidation voltages have been evaluated by x-ray diffraction using the sin2 ψ method. It is found that tensile residual stresses were present in the coatings, and they decreased from 1418 to 545 MPa as the oxidation voltages increased from 250 to 350 V. Correlations between the residual stresses and microstructural morphology have been discussed. The residual stress characteristics are attributed to the microcracks and the new phase formation during the MAO process.