Session A: Light MetalsNo Access

THE EFFECT OF Y ON THE OXIDATION OF Mg-Zn-Zr ALLOYS

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China

School of Materials Science and Engineering, Heilongjiang Institute of Science and Technology, Harbin, People's Republic of China

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FUYANG CAO

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China

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JANFEI SUN

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China

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https://doi.org/10.1142/S021797920906004XCited by:11 (Source: Crossref)

Abstract

The effects of Y addition up to 5.13% (in weight) to Mg-Zn-Zr alloys on oxidation behaviors under atmospheric ambient conditions were investigated in this study. Samples were heated in the ambient atmosphere at 400°C, with samples cooled to room temperature for mass measurement after some period time of cumulative exposure to obtain kinetic curves. XRD is used to analyze the mixture of oxides. Scanning electron microscopy combined with energy dispersive spectroscopy was used to study the scale microstructure and to obtain composition-depth profiles through the oxide layers. The oxidation results show that the weight gains for the alloys containing low Y concentration are obvious. The oxide films are thick and porous on the alloys containing low Y and thin and protective on alloys containing relatively high Y concentration. The addition of Y into Mg-Zn-Zr alloys results in the formation of protective film which is resistant to oxidation.

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