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Journal of Inorganic Materials

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2008 , Vol. 23 >Issue 1: 114 - 120

DOI: https://doi.org/10.3724/SP.J.1077.2008.00114

Research Paper

Simulation of Quenching Process during Microarc Oxidation (MAO) and its Effect on the Microstructure of Al2O3 Coating

  • LI Hua-Ping ,
  • CHAI Guang-Yue ,
  • PENG Wen-Da ,
  • YANG Ying ,
  • GAO Min ,
  • GUO Bao-Ping ,
  • NIU Han-Ben
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  • 1. Xi’an Institute of Optics and Precession Mechanics, Chinese Academy of Sciences, Xi’an 710068, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; 3. Institute of Optoelectronics, Shenzhen University, Shenzhen 518060, China

Received date: 2007-01-20

  Revised date: 2007-03-29

  Online published: 2008-01-20

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Abstract

The convection heat transfer coefficient on A12O3 coating during microarc oxidation process was estimated by experiment and
simulation. The Al2O3/Al interface was found to be a heat-transfer passage. During quenching, most heat of the micro-melting-pool was transferred through the Al substrate and the A12O3 coating nearby. The micro-melting-pool was modeled by the finite element method (FEM), and the process of quenching was characterized by the simulated temperature-time curves of the nodes along the depth, respectively. The effects of the quenching on the distribution of α-A12O3 and surface morphology of A12O3 coating were discussed by comparing the relative cooling rate at different positions. The influence of pressure on the microstructure of Al2O3 coating was also discussed briefly.

Key words： Al alloy; microarc oxidation; quenching; microstructure; FEM

Cite this article

LI Hua-Ping , CHAI Guang-Yue , PENG Wen-Da , YANG Ying , GAO Min , GUO Bao-Ping , NIU Han-Ben . Simulation of Quenching Process during Microarc Oxidation (MAO) and its Effect on the Microstructure of Al2O3 Coating[J]. Journal of Inorganic Materials, 2008 , 23(1) : 114 -120 . DOI: 10.3724/SP.J.1077.2008.00114

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