Physical Properties of Oxide Films Formed by Plasma Anodization on Mg Alloy

Lee, Sung-Hyung; Yashiro, Hitoshi; Aoki, Kazuki; Nanao, Hidetaka; Kure-Chu, Song-Zhu

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자료유형: 학술저널

저자정보: 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)

저널정보: 한국재료학회 한국재료학회지 한국재료학회지 제29권 제11호

발행연도: 2019.1

수록면: 657 - 663 (7page)

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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.

#AZ91D Mg alloy #plasma anodizing #coating #friction properties #thermal conductivity

참고문헌 (19)

참고문헌 신청

이성형 / 2017 / Fabrication of Plasma Electrolytic Oxidation Coatings on Magnesium AZ91D Casting Alloys / 한국표면공학회지 50(6):432~438

이성형 / 2018 / Effect of Power Mode of Plasma Anodization on the Properties of formed Oxide Films on AZ91D Magnesium Alloy / 한국재료학회지 28(10):544~550

이성형 / 2019 / Electrolyte Temperature Dependence on the Properties of Plasma Anodized Oxide Films Formed on AZ91D Magnesium Alloy / 한국재료학회지 29(5):288~296

E. K. Beauchamp / 1971 / J. Am. Ceram. Soc 54:484

S. Ono / 1996 / J. Electrochem. Soc 143:62

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