Experimental investigation and thermodynamic calculation of the phase equilibria in the Cu-Mo-Ni ternary system

Yan Yu, Cuiping Wang, Yifu Li, Xingjun Liu, Ryosuke Kainuma, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The phase equilibria at 900 °C, 1000 °C, 1100 °C, 1200 °C and 1300 °C in the Cu-Mo-Ni system were experimentally determined by means of optical microscopy (OM), electron probe microanalyzer (EPMA) and X-ray diffraction (XRD) on the equilibrated alloys. The experimental results firstly found that the fcc-type miscibility gap exists at 900 °C, 1000 °C, 1100 °C and 1200 °C in the Cu-Mo-Ni system, and the solubility of Cu in the MoNi phase at 900 °C, 1000 °C, 1100 °C and 1200 °C are about 0.5 at.%, 1.5 at.%, 1.7 at.% and 4.0 at.%, respectively. The as-cast Cu 20Mo20Ni60 (at.%), Cu20Mo 30Ni50 (at.%), Cu10Mo60Ni 30 (at.%), Cu70Mo10Ni60 (at.%), Cu20Mo60Ni20 (at.%) and Cu80Mo 10Ni10 (at.%) alloys appear the separated macroscopic morphologies, which are caused by the liquid phase separation on cooling, while the as-cast Cu10Mo25Ni65 (at.%), Cu 32Mo5Ni63 (at.%) and Cu30.7Mo 6.3Ni63 (at.%) alloys show the homogenous microscopic morphologies. On the basis of the experimental data investigated by the present and previous works, the phase equilibria in the Cu-Mo-Ni system were thermodynamically assessed by using CALPHAD (Calculation of Phase Diagrams) method, and a consistent set of the thermodynamic parameters leading to reasonable agreement between the calculated results and experimental data was obtained.

Original languageEnglish
Pages (from-to)37-45
Number of pages9
JournalMaterials Chemistry and Physics
Volume125
Issue number1-2
DOIs
Publication statusPublished - 2011 Jan 1

Keywords

  • CALPHAD
  • Cu-Mo-Ni alloys
  • Electron probe
  • Phase equilibria

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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