Dealloying behavior of amorphous binary Ti-Cu alloys in hydrofluoric acid solutions at various temperatures

Zhenhua Dan, Fengxiang Qin, Shin Ichi Yamaura, Yu Sugawara, Izumi Muto, Nobuyoshi Hara

研究成果: Article査読

16 被引用数 (Scopus)

抄録

A nanoporous copper structure was fabricated from amorphous binary TixCu100-x (x = 40, 50 and 60 at.%) alloys in hydrofluoric acid solutions under a free corrosion condition. A bi-continuous nanoporous structure has a pore size of 25-75 nm and a ligament size of 46-79 nm in 0.03 M HF solution. In 0.13 M HF solution, a pore size of 85-380 nm and a ligament size of 80-338 nm were obtained. The dealloying process is thermal-activated and obeys the Arrhenius law. The surface diffusivity decreases with temperature and concentrations of dealloying solutions. The values of the activation energy of copper adatoms are estimated to be 40.3-78.1 kJ mol-1, which depend not only on the alloy composition but also on the dealloying electrolyte composition.

本文言語English
ページ(範囲)567-572
ページ数6
ジャーナルJournal of Alloys and Compounds
581
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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