Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Characterization of the Oxide Layer Formed on the Cu-Zr Based Metallic Glass during Continuous Heating

  • Lim, Ka-Ram (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Won-Tae (Department of Optical Engineering, Cheongju University) ;
  • Kim, Do-Hyang (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University)
  • Received : 2012.09.06
  • Accepted : 2012.09.15
  • Published : 2012.09.30
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Abstract

In the present study, the oxidation behavior of $Cu_{50}Zr_{50}$ and $Cu_{46}Zr_{46}Al_8$ metallic glasses has been investigated using transmission electron microscopy with a particular attention on the oxidation behavior in the supercooled liquid state. Identification of the oxidation product after continuous heating treatment shows that in $Cu_{50}Zr_{50}$ metallic glass, $ZrO_2$ with the monoclinic structure forms on the supercooled liquid as well as on the crystallized matrix. On the contrary, in $Cu_{46}Zr_{46}Al_8$ metallic glass, $ZrO_2$ 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 $Cu_{50}Zr_{50}$ metallic glass exhibits far better oxidation resistance in the supercooled liquid state than the $Cu_{46}Zr_{46}Al_8$ metallic glass.

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References

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