Thermodynamics and liquid phase separation In the Cu-Co-Nb ternary alloys

Yan Yu, Xingjun Liu, Zhipeng Jiang, Cuiping Wang, Ryosuke Kainuma, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


This work first deals with the effect of Nb addition on the liquid phase separation in the Cu-Co system, which displays a metastable liquid miscibility gap. The isothermal sections at 800, 900, 1000, 1100, and 1200 °C in the Cu-Co-Nb system have been experimentally determined by optical microscopy, electron probe microanalysis, and x-ray diffraction on the equilibrated alloys, and the phase equilibria in the Cu-Co-Nb ternary system were thermodynamically assessed by using CALPHAD (Calculation of Phase Diagrams) method on the basis of the presently determined experimental data. Nb additions can stabilize themetastable liquid phase separation in the Cu-Co binary system and significantly increase its critical temperature. The solidified Cu-Co-Nb alloys appearing on the top-bottom separated microstractiiral morphology under low cooling rate while forming core-type macrostructuralmorphology under high cooling rate have been confirmed

Original languageEnglish
Pages (from-to)1706-1717
Number of pages12
JournalJournal of Materials Research
Issue number9
Publication statusPublished - 2010 Sept

ASJC Scopus subject areas

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


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