Extraction of precipitates from age-hardenable Cu-Ti alloys

Satoshi Semboshi, Mikio Ishikuro, Shigeo Sato, Kazuaki Wagatsuma, Takayuki Takasugi

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


An extraction procedure has been developed to separate the precipitates, namely, metastable fine α-Cu4Ti with a tetragonal structure and stable coarse β-Cu4Ti with an orthorhombic structure, from an age-hardenable Cu-Ti alloys. When the alloy was submerged in a 7.0 M nitric acid solution at 273 K, only the Cu solid solution matrix was dissolved chemically, and both precipitates were left as insoluble residue. Subsequent structural and chemical-compositional analyses of the insoluble residue and filtrate determined the mass fraction and composition of the precipitates and matrix with high accuracy.

Original languageEnglish
Pages (from-to)23-31
Number of pages9
JournalMaterials Characterization
Publication statusPublished - 2013


  • Aging
  • Cu-Ti alloys
  • Extraction
  • Precipitate
  • X-ray diffraction


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