Dealloying Behaviours of an Equiatomic TiCu Alloy

• Dan Zhenhua

  Institute for Materials Research, Tohoku University Department of Materials Science, Tohoku University

• Qin Fengxiang

  Institute for Materials Research, Tohoku University

• Sugawara Yu

  Department of Materials Science, Tohoku University

• Muto Izumi

  Department of Materials Science, Tohoku University

• Hara Nobuyoshi

  Department of Materials Science, Tohoku University

Bibliographic Information

Other Title

• Dealloying behavior of amorphous binary Ti–Cu alloys in hydrofluoric acid solutions at various temperatures

Abstract

The crystalline Ti₅₀Cu₅₀ ribbon was prepared by annealing its amorphous counterpart at 773 K, 84 K higher than its crystallization temperature. An equiatomic TiCu intermetallic phase dominated in the matrix coexisting with trace Ti₂Cu phase segregated on the grain boundary. A bi-continuous nanoporous copper from tenths of nanometers to hundredths of nanometers was obtained after dealloying the crystalline Ti₅₀Cu₅₀ ribbons in 0.03 and 0.13 kmol/m³ HF solutions. The TiCu phase stayed inert at the initial immersion and the Ti₂Cu zone preferentially dissolved to form trenches. After a prolonged immersion in HF solutions, both TiCu and Ti₂Cu phases were fully dealloyed. Final nanoporous Cu had a multiple-channel characteristic in different regions where various intermetallic phases distributed. Finer nanoporous Cu formed in the regions where the TiCu phase with a higher electrochemical stability dominated.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 54 (7), 1120-1125, 2013

  The Japan Institute of Metals and Materials

Keywords

• intermetallic
• crystallization
• nanoporous copper
• dealloying
• equiatomic titanium–copper alloy

Details

• CRID: 1390282679226369664
• NII Article ID: 10031183655
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.m2013033
• DOI: 10.1016/j.jallcom.2013.07.144
• COI: 1:CAS:528:DC%2BC3sXhsVGjtrbN
• ISSN: 13475320
• ISSN: 13459678
• ISSN: 09258388
• NDL BIB ID: 024647520
• Web Site: http://id.ndl.go.jp/bib/024647520
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024647520
• Web Site: https://api.elsevier.com/content/article/PII:S0925838813017696?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S0925838813017696?httpAccept=text/plain
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/54/7/54_M2013033/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed