Characterization of the Oxide Layer Formed on the Cu-Zr Based Metallic Glass during Continuous Heating
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In the present study, the oxidation behavior of Cu50Zr50 and Cu46Zr46Al8 metallic glasses has been investigated using transmission electron microscopy with a particular attention on the oxidation behavior in the supercooled liquid state. Identifi cation of the oxidation product after continuous heating treatment shows that in Cu50Zr50 metallic glass, ZrO2 with the monoclinic structure forms on the supercooled liquid as well as on the crystallized matrix. On the contrary, in Cu46Zr46Al8 metallic glass, ZrO2 with the tetragonal structure forms on the supercooled liquid, but that with the monoclinic structure forms on the crystallized matrix. The result indicates that the Cu50Zr50 metallic glass exhibits far better oxidation resistance in the supercooled liquid state than the Cu46Zr46Al8 metallic glass.
Abstract
In the present study, the oxidation behavior of Cu50Zr50 and Cu46Zr46Al8 metallic glasses has been investigated using transmission electron microscopy with a particular attention on the oxidation behavior in the supercooled liquid state. Identifi cation of the oxidation product after continuous heating treatment shows that in Cu50Zr50 metallic glass, ZrO2 with the monoclinic structure forms on the supercooled liquid as well as on the crystallized matrix. On the contrary, in Cu46Zr46Al8 metallic glass, ZrO2 with the tetragonal structure forms on the supercooled liquid, but that with the monoclinic structure forms on the crystallized matrix. The result indicates that the Cu50Zr50 metallic glass exhibits far better oxidation resistance in the supercooled liquid state than the Cu46Zr46Al8 metallic glass.
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