Comparative TEM investigation on the precipitation behaviors in Cu-15wt%Sn alloy

Zeng Jie Wang, Konno J. Toyohiko, Chao Li Ma

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The decomposition and precipitation behaviors of a quenched Cu-15wt%Sn alloy as a function of aging temperature were investigated using transmission electron microscopy (TEM). Focused ion beam (FIB) was employed to assist TEM specimen preparation. At 300 C, the decomposition of the supersaturated α′ phase occurred at grain boundaries, displaying a cellular morphology. The lamellae were found with ζ and α phases, rather than with the equilibrium ε and α phases. The ζ and α phases exhibit a well-defined orientation relationship (OR) as (110) α//(0001)ζ,[112]α//[1210] ζ. On the other hand, at 320 C, only incipient lamellar structures of several micron meters were observed, which were composed of the δ and α phases. At the same time, abundant intragranular precipitation of the ε phase in the form of platelets was observed, and OR as (111)α//(001)ε, [110] α //[100] ε exists between ε phase and the α phase. These contrasting precipitation behaviors are discussed from the viewpoint of crystallographic coherency of these phases.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalRare Metals
Issue number2
Publication statusPublished - 2013 Apr


  • Crystallography
  • Cu-Sn alloy
  • Focused ion beam (FIB)
  • Precipitation behaviors
  • TEM

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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