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The oxidation behavior of the crystallized Al87Ni3Y10 alloy has been investigated with an aim to compare with that of the amorphous Al87Ni3Y10 alloy. The oxidation at 873 K occurs as follows: (1) growth of an amorphous aluminum-yttrium oxide layer (~10 nm) after heating up to 873 K; and (2) formation of YAlO3 crystalline oxide (~220 nm) after annealing for 30 hours at 873 K. Such an overall oxidation step indicates that the oxidation behavior in the crystallized Al87Ni3Y10 alloy occurs in the same way as in the amorphous Al87Ni3Y10 alloy. The simultaneous presence of aluminum and yttrium in the oxide layer significantly enhances the thermal stability of the amorphous structure in the oxide phase. Since the structure of aluminum-yttrium oxide is dense due to the large difference in ionic radius between aluminum and yttrium ions, the diffusion of oxygen ion through the amorphous oxide layer is limited thus stabilizing the amorphous structure of the oxide phase.
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참고문헌 (9)
참고문헌 신청
Carmo M / 2011 / Bulk metallic glass nanowire architecture for electrochemical applications / ACS Nano 5 : 2979 ~ 2983
J. H. Han / 2011 / Effect of Microstructure Modulation on Mechanical Properties of Ti-Fe-Sn Ultrafine Eutectic Composites / Metals and Materials International 17 (6) : 873 ~
Kim K C / 2013 / Thermal stability of amorphous oxide in Al87Ni3Y10 metallic glass / Corros. Sci 77 : 1 ~ 5
Kim S J / 2012 / Exploiting metallic glasses for 19.6% efficient back contact solar cell / Appl. Phys. Lett 101 : 064106 ~ 064106
Lim K R / 2012 / Oxidation resistance of the supercooled liquid in Cu50Zr50 and Cu46Zr46Al8 metallic glasses / J. Mater. Res 27 : 1178 ~ 1186
J. H. Han / 2011 / Effect of Microstructure Modulation on Mechanical Properties of Ti-Fe-Sn Ultrafine Eutectic Composites / Metals and Materials International 17 (6) : 873 ~
Kim K C / 2013 / Thermal stability of amorphous oxide in Al87Ni3Y10 metallic glass / Corros. Sci 77 : 1 ~ 5
Kim S J / 2012 / Exploiting metallic glasses for 19.6% efficient back contact solar cell / Appl. Phys. Lett 101 : 064106 ~ 064106
Lim K R / 2012 / Oxidation resistance of the supercooled liquid in Cu50Zr50 and Cu46Zr46Al8 metallic glasses / J. Mater. Res 27 : 1178 ~ 1186
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