Microstructure of Ti-Ag immiscible alloys with liquid phase separation

Takeshi Nagase; Megumi Matsumoto; Yoshikazu Fujii

doi:10.1016/j.jallcom.2017.12.138

Microstructure of Ti-Ag immiscible alloys with liquid phase separation

Takeshi Nagase, Megumi Matsumoto, Yoshikazu Fujii

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

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 Ti_66.67Ag_33.33 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 Ti_33.33Ag_66.67 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.

Original language	English
Pages (from-to)	440-447
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	738
DOIs	https://doi.org/10.1016/j.jallcom.2017.12.138
Publication status	Published - 2018 Mar 25
Externally published	Yes

Keywords

Metallography
Metals and alloys
Microstructure
Rapid-solidification
Titanium alloys
Transmission electron microscopy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2017.12.138

Cite this

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title = "Microstructure of Ti-Ag immiscible alloys with liquid phase separation",

abstract = "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.",

keywords = "Metallography, Metals and alloys, Microstructure, Rapid-solidification, Titanium alloys, Transmission electron microscopy",

author = "Takeshi Nagase and Megumi Matsumoto and Yoshikazu Fujii",

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year = "2018",

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doi = "10.1016/j.jallcom.2017.12.138",

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journal = "Journal of Alloys and Compounds",

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T1 - Microstructure of Ti-Ag immiscible alloys with liquid phase separation

AU - Nagase, Takeshi

AU - Matsumoto, Megumi

AU - Fujii, Yoshikazu

PY - 2018/3/25

Y1 - 2018/3/25

N2 - 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.

AB - 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.

KW - Metallography

KW - Metals and alloys

KW - Microstructure

KW - Rapid-solidification

KW - Titanium alloys

KW - Transmission electron microscopy

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EP - 447

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Microstructure of Ti-Ag immiscible alloys with liquid phase separation

Abstract

Keywords

ASJC Scopus subject areas

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