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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 4    August 2009

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Effect of Y and Y2O3 on oxidation of AZ91D Mg alloys between 400 ℃ and 500 ℃
Sang-Hwan BAK, Dong-Bok LEE

School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 440-746, Korea

Abstract:AZ91D, AZ91D+1%Y, and AZ91D+3%Y2O3 (mass fraction) alloys were cast, and oxidized between 400 and 500 ℃ in air. The oxidation resistance increased in the order of AZ91D, AZ91D+3%Y2O3, and AZ91D+1%Y, indicating that Y was more effective than Y2O3 in increasing the oxidation resistance of the Mg alloys. However, all the alloys tested experienced ignition because the major oxide was MgO.

 

Key words: magnesium; yttrium; yttria; oxidation

ISSN 1672-7029
CN 43-1423/U

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