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Phase equilibria in the Ni–Co–Ga alloy system

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
466
Identifiers
DOI: 10.1016/j.jallcom.2007.11.103
Keywords
  • Intermetallics
  • Metals

Abstract

Abstract Phase equilibria among the α (A1), α′ (L1 2), β (B2), δ (Ni 5Ga 3) and ɛ (Ni 13Ga 9) phases at elevated temperatures and the existing composition region of the martensite phase at room temperature in the Ni–Co side of the Ni–Co–Ga system were examined by electron probe microanalysis (EPMA) using diffusion triples which were fabricated by two-step diffusion coupling. It was confirmed that single-phase regions of the α, α′ and β phases at 700 and 1000 °C exist in a wide composition range parallel to Ni–Co section and that the existing region of the martensite phase at room temperature is also located over a wide range in the β phase along the β + α (or α′) two-phase region.

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