Phase equilibria in Ni-rich portion of Ni-Si system

Katsunari Oikawa, Ryo Saito, Kosei Kobayashi, Jun Yaokawa, Koichi Anzai

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The phase equilibria of the Ni-rich portion in the Ni-Si system were investigated. The phase boundaries between liquid and fee phases were established by the diffusion couple method and those of fee and β 1 or β 2 determined by the SEM-EDX measurement of two-phase alloys. The liquidus of the present work well agrees with the previous experimental data determined by a thermal analysis. The solidus data are rather different from the previous experimental data, but agree with the thermodynamic calculated phase diagram. This result suggests that the present solidus and liquidus data are consistent with thermodynamic data. The solubility of Si in the fee phase agrees with some previous experimental data, but disagrees with the thermodynamic calculated phase diagram. This fact suggests that the thermodynamic reassessment for this system is necessary by the CALPHAD approach.

Original languageEnglish
Pages (from-to)2259-2262
Number of pages4
JournalMaterials Transactions
Volume48
Issue number9
DOIs
Publication statusPublished - 2007 Sep

Keywords

  • Diffusion couple
  • Phase diagram
  • Solidification

ASJC Scopus subject areas

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

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