한국재료학회지 (Korean Journal of Materials Research)

  • 제29권11호
  • /
  • Pages.657-663
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  • 2019
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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Physical Properties of Oxide Films Formed by Plasma Anodization on Mg Alloy

  • Lee, Sung-Hyung (Gakko hojin Kitahara gakuen) ;
  • Yashiro, Hitoshi (Department of Chemistry and Biological Science, Iwate University) ;
  • Aoki, Kazuki (Department of Chemistry and Biological Science, Iwate University) ;
  • Nanao, Hidetaka (Department of Chemistry and Biological Science, Iwate University) ;
  • Kure-Chu, Song-Zhu (Materials Function and Design, Nagoya Institute of Technology)
  • 투고 : 2019.08.04
  • 심사 : 2019.09.26
  • 발행 : 2019.11.27
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초록

In this work, we study physical and mechanical properties of oxide films formed on AZ91D magnesium alloy by plasma anodization at different temperatures. It is found that the higher the electrolyte temperature, the lower is the breakdown voltage of oxide layer. This is probably because films formed at higher temperatures are thinner and denser. Moreover, electrolyte temperature plays an important role in the physical properties of the films. As the electrolyte temperature increases from 20 to $50^{\circ}C$, the hardness of the oxide layer increases. Friction test against steel balls indicates that wear scars become narrower for films formed at higher temperatures because the films are harder, as indicated by the Vickers hardness. The thinner and denser nature of the oxide film formed at $50^{\circ}C$ is also advantageous for heat transfer when film is used as a heat sink. Laser flash test results show very fast heat transfer for AZ91D with plasma anodized oxide layer formed at higher temperatures.

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참고문헌

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