Uniform evolution of nanoporosity on amorphous Ti-Cu alloys

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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Amorphous binary Ti100-xCux (x = 40, 50 and 60 at%) alloys, as the starting materials, were dealloyed in 0.03 and 0.13 M HF solutions under a free immersion condition, and a uniform nanoporous structure with a pore size of 71-220 nm and ligament size of 72-209 nm was obtained after immersion for 43.2 ks. The evolution of nanoporosity underwent more uniformly due to the absence of the intermetallics and defects such as grain boundary, segregation in the chemical composition in the amorphous precursors. The pore size and the ligament size increased with the immersion times and the concentration of the treatment solutions. The pore size increased with the dealloying times exponentially with an exponent of 0.41-0.79. The evolution of nanoporosity was influenced by the alloy compositions, and the formation of the ligaments was controlled by surface diffusion of the Cu adatoms, and also influenced by the coverage of noble Cu contents in Ti-Cu alloys.

Original languageEnglish
Pages (from-to)7879-7883
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume14
Issue number10
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Dealloying
  • Nanoporous copper
  • Surface diffusion
  • Ti-Cu amorphous alloy

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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