The refinement of the nanoporous copper by adding third elements

Zhen Hua Dan, Feng Xiang Qin, Nobuyoshi Hara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fine nanoporous copper was fabricated from the amorphous Ti-Cu alloys with a minoraddition of silver in 10 mM HF solutions. The pore sizes decreased from 100 nm to 12 nm with theincrease of the Ag contents in comparison of Ti60Cu40 ribbons free of Ag. With increasing of thedealloying time, the sizes of the nanopores and ligaments increased for the nanostrucutres onTi60Cu38Ag2 ribbons since the segregation of the Ag phase which triggered the galvanic dissolutionof the adjacent Cu matrix in form of micro-couplings to further coarsen the nanoporous Cu. On thecontrary, the trace formation of the Ag phase on the Ti60Cu39Ag1 ribbons had a weak ability tomotivate the galvanic dissolution, indicating by the constant pore sizes and slight decrease in theligament sizes with the increase in the dealloying time. The refinement of the nanoporous structureswas ascribed to the drastic decrease in the surface diffusivity. The decrease in the surface diffusivitydue to the involvement of Ag with a lower surface diffusivity in comparison of Cu was more thanone order of magnitude. The involvement of Ag adatoms restricted the diffusion of Cu adatoms inthe interface regions in the inward and outward directions.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages1986-1989
Number of pages4
ISBN (Print)9783038350736
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2013 Dec 22013 Dec 6

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period13/12/213/12/6

Keywords

  • Dealloying
  • Metallic glasses
  • Nanoporous metals
  • Silver addition
  • Surface diffusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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