English, Article edition: MICROSTRUCTURE AND ELEMENT DISTRIBUTIONS OF CERAMIC-LIKE COATINGS ON THE AZ91 ALLOY BY MICRO-ARC OXIDATION CHUANZHONG CHEN; QING DONG; DIANGANG WANG

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Bookmark: http://trove.nla.gov.au/version/84025
Physical Description
  • article
Language
  • English

Edition details

Title
  • MICROSTRUCTURE AND ELEMENT DISTRIBUTIONS OF CERAMIC-LIKE COATINGS ON THE AZ91 ALLOY BY MICRO-ARC OXIDATION
Author
  • CHUANZHONG CHEN
  • QING DONG
  • DIANGANG WANG
Physical Description
  • article
Notes
  • Ceramic-like coatings were deposited on the substrate of the AZ91 alloy by micro-arc oxidation (MAO). Many methods like X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron diffraction spectroscopy (EDS) were used to analyze the structure and composition of the coating. XRD showed that the MAO coating was mainly composed of MgO. The results of SEM showed that the coating surface possessed a porous microstructure and the pore size was in the range of 1â3 μm. EDS indicated that the coating matrix was relatively dense and had a homogeneous thickness. The element silicon from the applied electrolyte could be absorbed into the coating in the MAO process. The hardness of the MgO coatings could reach 513 HV0.025 that was about four times higher than that of the substrate. It is expected that the coatings have a great potential in the surface protection of magnesium alloys.
  • Micro-arc oxidation, phase component, morphology, the AZ91 alloy
  • RePEc:wsi:srlxxx:v:13:y:2006:i:01:p:63-68
Language
  • English
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