Nanoporous copper dealloyed from a nanocrystallized TiCu alloy

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationAdvanced Materials Science and Technology
PublisherTrans Tech Publications Ltd
Number of pages4
ISBN (Print)9783037856604
Publication statusPublished - 2013
Event8th International Forum on Advanced Materials Science and Technology, IFAMST 2012 - Fukuoka City, Japan
Duration: 2012 Aug 12012 Aug 4

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Conference8th International Forum on Advanced Materials Science and Technology, IFAMST 2012
CityFukuoka City


  • Dealloying
  • Metallic glasses
  • Nanocrystallization
  • Nanoporous metals


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