Fabrication of nanoporous copper by dealloying amorphous binary Ti-Cu alloys in hydrofluoric acid solutions

Zhenhua Dan, Fengxiang Qin, Yu Sugawara, Izumi Muto, Nobuyoshi Hara

研究成果: Article査読

50 被引用数 (Scopus)

抄録

A nanoporous copper structure was fabricated from amorphous binary Ti xCu 100-x (x = 30, 40, 50 and 60 at.%) alloys in hydrofluoric acid solutions under a free corrosion condition. The great difference in the standard electrode potentials of Ti/Ti 2+ and Cu/Cu 2+ pairs and the uniformity in microstructure promise the formation of a nanoporous structure of copper. A bicontinuous nanoporous structure from tenths of nanometers to hundredths of nanometers was formed by dealloying less noble titanium element, depending on alloy composition, solution concentration and treatment time. Hydrofluoric acid effectively dissolved the native TiO 2 layer. The fluoride ions were found to react selectively with Ti to form a soluble species and thus played a key role in the process.

本文言語English
ページ(範囲)14-20
ページ数7
ジャーナルIntermetallics
29
DOI
出版ステータスPublished - 2012 10

ASJC Scopus subject areas

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

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