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KMID : 1102020160460030160
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Applied Microscopy
2016 Volume.46 No. 3 p.160 ~ p.163
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Effect of Dealloying Condition on the Formation of Nanoporous Structure in Melt-Spun Al60Ge30Mn10 Alloy
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Kim Kang-Cheol
Kim Won-Tae
Kim Do-Hyang
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Abstract
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Effect of dealloying condition on the formation of nanoporous structure in melt-spun Al60Ge30Mn10 alloy has been investigated in the present study. In as-melt-spun Al60Ge30Mn10 alloy spinodal decomposition occurs in the undercooled liquid during cooling, leading to amorphous phase separation. By immersing the as-melt-spun Al60Ge30Mn10 alloy in 5 wt% HCl solution, Al-rich amorphous region is leached out, resulting in an interconnected nano-porous GeOx with an amorphous structure. The dealloying temperature strongly affects the whole dealloying process. At higher dealloying temperature, dissolution kinetics and surface diffusion/agglomeration rate become higher, resulting in the accelerated
dealloying kinetics, i.e., larger dealloying depth and coarser pore-ligament structure.
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KEYWORD
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Amorphous alloy, Dealloying, Nanoporous structure
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