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Oxidation resistance of the supercooled liquid in Cu50Zr50 and Cu46Zr46Al8 metallic glasses

  • Ka Ram Lim (a1), Won Tae Kim (a2), Eun-Sung Lee (a3), Sang Soo Jee (a3), Se Yun Kim (a3), Do Hyang Kim (a4), Annett Gebert (a5) and Jurgen Eckert (a6)...


The oxidation behavior of Cu50Zr50 and Cu46Zr46Al8 glasses during continuous heating up to 1073 K has been investigated, with special emphasis on the oxidation resistance in the supercooled liquid (SCL) state. For Cu50Zr50, the oxide layer mostly consists of monoclinic ZrO2 (m-ZrO2), while for Cu46Zr46Al8, the oxide layer consists of two different layers: an outer layer consisting of tetragonal ZrO2 (t-ZrO2) + Al2O3 + metallic Cu (oxidation product from the SCL state of the glass matrix) and inner layer comprised of m-ZrO2 + metallic Cu islands (oxidation product from the crystallized matrix). Cu-enriched regions consisting of Cu51Zr14 (in Cu50Zr50) or AlCu2Zr + Cu70Zr15Al15 + Cu51Zr14 (in Cu46Zr46Al8) are present below the oxide layer. The present study shows that the addition of Al (8 at.%) in Cu50Zr50 results in a significant deterioration of the oxidation resistance in the SCL state since the solutionizing of Al in t-ZrO2 leads to a higher oxygen ion vacancy concentration, thus providing a higher activity of oxygen ions.


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Oxidation resistance of the supercooled liquid in Cu50Zr50 and Cu46Zr46Al8 metallic glasses

  • Ka Ram Lim (a1), Won Tae Kim (a2), Eun-Sung Lee (a3), Sang Soo Jee (a3), Se Yun Kim (a3), Do Hyang Kim (a4), Annett Gebert (a5) and Jurgen Eckert (a6)...


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