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Journal of Phase Equilibria

, Volume 14, Issue 4, pp 479–484 | Cite as

Experimental investigation of the Tb-Mg phase diagram

  • A. Saccone
  • S. Delfino
  • D. Macciò
  • R. Ferro
Section I: Basic and Applied Research

Abstract

The Tb-Mg alloys were studied in the range 0 to 100 at.% Mg, by using X-ray powder diffraction, optical and scanning electron microscopy, electron probe microanalysis (EPMA), and differential thermal analysis (DTA). The following intermediate phases were identified and their crystal structures confirmed: TbMg (cubic,cP2 CsCl type), TbMg2 (hexagonal,hP12-MgZn2 type), and TbMg3 (cubic,cF16-BiF3 type). Two phases, moreover, were confirmed or identified in a composition range very close to 83 at.% Mg: χ1 phase (cubic,cF440-GdMg5 type) and χ2 phase (cubic,cI58-αMn type). All the phases show peritectic formation with the possible exception of the χ2 phase. The following phase equilibria were also determined: a eutectic reaction at 530 °C and 90.5 at.% Mg and a eutectoidal decomposition of the (βTb) phase at 670 °C and ∼28 at.% Mg.

Keywords

Differential Thermal Analysis Peritectic Reaction Maximum Solid Solubility Average Atomic Volume Atomic Rare Earth Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International 1993

Authors and Affiliations

  • A. Saccone
    • 1
  • S. Delfino
    • 1
  • D. Macciò
    • 1
  • R. Ferro
    • 1
  1. 1.Istituto di Chimica GeneraleUniversitá di Genova Viale Benedetto XVGenovaItaly

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