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Oxidation induced amorphous stabilization of the subsurface region in Zr-Cu metallic glass
被引:19
|作者:
Lim, K. R.
[1
]
Park, J. M.
[2
]
Park, S. H.
[3
]
Na, M. Y.
[3
]
Kim, K. C.
[3
]
Kim, W. T.
[4
]
Kim, D. H.
[3
]
机构:
[1] Korea Inst Mat Sci, Light Met Div, Chang Won 642831, Gyeongnam, South Korea
[2] Samsung Adv Inst Technol, Mat Res Ctr, Yongin 446712, Gyeonggi Do, South Korea
[3] Yonsei Univ, Ctr Noncrystalline Mat, Dept Mat Sci & Engn, Seoul 120749, South Korea
[4] Cheongju Univ, Dept Opt Engn, Cheongju 360764, South Korea
关键词:
SELECTIVE OXIDATION;
CRYSTALLIZATION BEHAVIOR;
AIR-OXIDATION;
PHASE;
OXYGEN;
TRANSFORMATION;
CU50ZR50;
ALLOYS;
SI;
D O I:
10.1063/1.4862025
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
In the present study, we demonstrate that selective surface oxidation of Zr70Cu30 metallic glass can stabilize the amorphous structure in the subsurface region of the matrix. The oxidation proceeds by selective oxidation of Zr, forming monoclinic ZrO2 layer on the surface, and the subsurface layer becomes Cu-enriched due to back diffusion of Cu atoms from the oxide layer. Interestingly, in this system, the composition change in the subsurface region leads to enhancement of glass stability, forming of a double layered surface structure consisted of inner amorphous layer and outer monoclinic ZrO2 layer even when the remaining matrix is completely crystallized. (C) 2014 AIP Publishing LLC.
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页数:4
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