Nanoporous copper dealloyed from a nanocrystallized TiCu alloy

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

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Nanoporous copper (NPC) was fabricated through dealloying nanocrystallized Ti50Cu50 ribbon alloy under a free immersion condition in HF solutions at 25°C. Multimodal nanoporous structure was formed due to the presence of Ti3Cu4 phase, which was co-precipitated with Ti2Cu during the heat treatment at T = 400°C (Tg < T < Tx). The presence of multiphases in the starting material caused the different behavior in the evolution of nanoporosity. In 0.03 mol/L HF solution, the bimodal nanoporous copper with a pore size of 54 nm and 184 nm was obtained in different regions where the composition differed. The ligament scale lengths in two regions were confirmed to be 54 nm and 203 nm, respectively. In 0.13 mol/L HF solution, the difference in the pore size and phase separation became weak, accompanying with the evolution of larger pores and smaller ligaments. The residue after dealloying was confirmed to be fcc Cu, indicated by the presence of Cu (111), (200), (220) and (311) in XRD patterns and TEM selective area diffraction pattern. The microstructure of the starting materials for dealloying, such as intermetallic phases, played a key role in the formation of the final multimodal nanoporous structure.

本文言語English
ホスト出版物のタイトルAdvanced Materials Science and Technology
出版社Trans Tech Publications Ltd
ページ72-75
ページ数4
ISBN(印刷版)9783037856604
DOI
出版ステータスPublished - 2013
イベント8th International Forum on Advanced Materials Science and Technology, IFAMST 2012 - Fukuoka City, Japan
継続期間: 2012 8 12012 8 4

出版物シリーズ

名前Materials Science Forum
750
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

Other8th International Forum on Advanced Materials Science and Technology, IFAMST 2012
国/地域Japan
CityFukuoka City
Period12/8/112/8/4

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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