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Amorphous/crystalline transition of copper at room-temperature

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
469
Identifiers
DOI: 10.1016/j.cplett.2008.12.100

Abstract

Abstract When a glassy alloy Cu 60.6Zr 29.4Ti 10.0 ribbon was immersed in weak acid HF solution at room-temperature, selective complete leaching out of the Zr and Ti elements occurred, resulting in the formation of a self-organized crystalline copper ribbon with grain size of 32 nm, by accelerated self-diffusion of Cu. Since the glassy alloy is formed by spd hybridization bonding, based on a combination of valence electrons ( Eg) that exceeds the electrons ( Ec) predicted by crystalline metallic bond theory, disappearance of its extra valence electrons, i.e., Δ E ( Eg – Ec = 0.24 eV) for copper, due to leach-out of the Zr and Ti elements, facilitates on crystallization of the copper agglomerate.

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