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Preparation and property of a modified micro-arc oxidation coating using Al2O3 particles on Ti6Al4V
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1.Guangdong Institute of New Materials,National Engineering Laboratory for Modern Materials Surface Engineering Technology,the Key Lab of Guangdong for Modern Surface Engineering Technology;2.School of Material and Energy Guangdong University of Technology

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Fund Project:

2017GDAS’ Special Project of Science and Technology Development (2017GDASCX-0844, 2017GDASCX-0111), 2017GDAS’ academician fund (2017GDASCX-0202)

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    Abstract:

    Micro-arc oxidation is a new surface treatment method, but the structure of the micro-arc oxidation coating is limited to the electrolyte composition. In this paper the micro-arc oxidation coating on Ti6Al4V alloy was modified by addition of micro- Al2O3 particles to a sodium phosphate solution. The coating structure and phase was characterized by scanning electron microscopy and X-ray diffraction, and the oxidation resistance and thermal shock properties of the coating were investigated. Results showed that a coating denser than the original coating was produced. This new coating was composed of Al2TiO5 and TiO2. The oxidation resistance and thermal shock property of the coating improved with addition of Al2O3 particles to the electrolyte relative to the sample prepared without the particles in the electrolyte. Moving Al2O3 particles were adsorbed on the coating surface and penetrated through it. As a result, the phase structure and properties of the original coating were modified.

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[Li Hong, Song Zhihui. Preparation and property of a modified micro-arc oxidation coating using Al2O3 particles on Ti6Al4V[J]. Rare Metal Materials and Engineering,2020,49(3):755~760.]
DOI:10.12442/j. issn.1002-185X.20181094

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History
  • Received:October 26,2018
  • Revised:October 31,2018
  • Adopted:November 08,2018
  • Online: April 08,2020
  • Published: