Microstructure of Ti-Ag immiscible alloys with liquid phase separation

Takeshi Nagase, Megumi Matsumoto, Yoshikazu Fujii

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Ti-Ag alloy is characterized by a flat liquidus line in the binary phase diagram. The microstructure of binary Ti-Ag alloys was investigated in terms of liquid phase separation. In the Ti-rich Ti66.67Ag33.33 alloy, the conventionally cast ingot showed a dendritic structure that included Ti-Ag-based intermetallic compounds; on the other hand, the rapidly solidified melt-spun ribbon showed a particulate microstructure comprising Ag-rich globules and a Ti-rich matrix phase. The formation of emulsion-like structures in the rapidly solidified specimens can be explained in terms of liquid phase separation. In the Ag-rich Ti33.33Ag66.67 alloy, macroscopic phase-separated ingots were obtained via liquid phase separation. The metastable liquid miscibility gap in Ti-Ag alloy system was discussed based on thermodynamics.

本文言語English
ページ(範囲)440-447
ページ数8
ジャーナルJournal of Alloys and Compounds
738
DOI
出版ステータスPublished - 2018 3 25
外部発表はい

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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