Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase                         +                         1

Takeshi Nagase; Tomoyuki Terai; Tomoyuki Kakeshita; Megumi Matsumoto; Yoshikazu Fujii

doi:10.2320/matertrans.Y-M2019803

Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase ⁺ 1

Takeshi Nagase, Tomoyuki Terai, Tomoyuki Kakeshita, Megumi Matsumoto, Yoshikazu Fujii

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

4 Citations (Scopus)

Abstract

The solidification microstructure and magnetic properties of rapidly solidified melt-spun ribbons in Cu _43.2 Ag _32.0 La _4.8 Fe ₂₀ (at%) alloy, which was designed as the combination of the CuAg-based Cu ₅₄ Ag ₄₀ La ₆ alloy with high glass-forming ability and Fe, was investigated. The composite of an amorphous matrix and dispersed crystalline phases were obtained in the melt-spun ribbons. The spherical BCC-Fe nanocrystals, which were surrounded by Cu-rich crystalline phases, were embedded in a CuAgLa-based amorphous matrix. The particular solidification structure in melt-spun ribbons can be explained by liquid-phase separation to form major CuAgLa-rich and minor Fe-rich liquids, an amorphous phase formation in major CuAgLa-rich liquid, and the crystallization of the separated Fe-rich liquid globules during the cooling of the thermal melt. The melt-spun ribbon shows typical ferromagnetic magnetic properties caused by the 10 nm-ordered spherical BCC-Fe nanocrystals.

Original language	English
Pages (from-to)	554-560
Number of pages	7
Journal	Materials Transactions
Volume	60
Issue number	4
DOIs	https://doi.org/10.2320/matertrans.Y-M2019803
Publication status	Published - 2019
Externally published	Yes

Keywords

Amorphous alloy
Electron microscopy
Magnetic property
Microstructure
Rapid solidification

ASJC Scopus subject areas

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

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Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase ⁺ 1 . / Nagase, Takeshi; Terai, Tomoyuki; Kakeshita, Tomoyuki; Matsumoto, Megumi; Fujii, Yoshikazu.

In: Materials Transactions, Vol. 60, No. 4, 2019, p. 554-560.

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

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title = " Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase + 1 ",

abstract = " The solidification microstructure and magnetic properties of rapidly solidified melt-spun ribbons in Cu 43.2 Ag 32.0 La 4.8 Fe 20 (at%) alloy, which was designed as the combination of the CuAg-based Cu 54 Ag 40 La 6 alloy with high glass-forming ability and Fe, was investigated. The composite of an amorphous matrix and dispersed crystalline phases were obtained in the melt-spun ribbons. The spherical BCC-Fe nanocrystals, which were surrounded by Cu-rich crystalline phases, were embedded in a CuAgLa-based amorphous matrix. The particular solidification structure in melt-spun ribbons can be explained by liquid-phase separation to form major CuAgLa-rich and minor Fe-rich liquids, an amorphous phase formation in major CuAgLa-rich liquid, and the crystallization of the separated Fe-rich liquid globules during the cooling of the thermal melt. The melt-spun ribbon shows typical ferromagnetic magnetic properties caused by the 10 nm-ordered spherical BCC-Fe nanocrystals. ",

keywords = "Amorphous alloy, Electron microscopy, Magnetic property, Microstructure, Rapid solidification",

author = "Takeshi Nagase and Tomoyuki Terai and Tomoyuki Kakeshita and Megumi Matsumoto and Yoshikazu Fujii",

note = "Funding Information: A part of this research was carried out with the support of the 24th research grant from the Kansai Research Foundation for Technology Promotion (KRF). The authors are grateful to Prof. T. Tanaka and Prof. M. Suzuki at the Osaka University for their help with the thermodynamic calculations. Publisher Copyright: {\textcopyright}2019 Japan Society of Powder and Powder Metallurgy",

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doi = "10.2320/matertrans.Y-M2019803",

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T1 - Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase + 1

AU - Nagase, Takeshi

AU - Terai, Tomoyuki

AU - Kakeshita, Tomoyuki

AU - Matsumoto, Megumi

AU - Fujii, Yoshikazu

N1 - Funding Information: A part of this research was carried out with the support of the 24th research grant from the Kansai Research Foundation for Technology Promotion (KRF). The authors are grateful to Prof. T. Tanaka and Prof. M. Suzuki at the Osaka University for their help with the thermodynamic calculations. Publisher Copyright: ©2019 Japan Society of Powder and Powder Metallurgy

PY - 2019

Y1 - 2019

N2 - The solidification microstructure and magnetic properties of rapidly solidified melt-spun ribbons in Cu 43.2 Ag 32.0 La 4.8 Fe 20 (at%) alloy, which was designed as the combination of the CuAg-based Cu 54 Ag 40 La 6 alloy with high glass-forming ability and Fe, was investigated. The composite of an amorphous matrix and dispersed crystalline phases were obtained in the melt-spun ribbons. The spherical BCC-Fe nanocrystals, which were surrounded by Cu-rich crystalline phases, were embedded in a CuAgLa-based amorphous matrix. The particular solidification structure in melt-spun ribbons can be explained by liquid-phase separation to form major CuAgLa-rich and minor Fe-rich liquids, an amorphous phase formation in major CuAgLa-rich liquid, and the crystallization of the separated Fe-rich liquid globules during the cooling of the thermal melt. The melt-spun ribbon shows typical ferromagnetic magnetic properties caused by the 10 nm-ordered spherical BCC-Fe nanocrystals.

AB - The solidification microstructure and magnetic properties of rapidly solidified melt-spun ribbons in Cu 43.2 Ag 32.0 La 4.8 Fe 20 (at%) alloy, which was designed as the combination of the CuAg-based Cu 54 Ag 40 La 6 alloy with high glass-forming ability and Fe, was investigated. The composite of an amorphous matrix and dispersed crystalline phases were obtained in the melt-spun ribbons. The spherical BCC-Fe nanocrystals, which were surrounded by Cu-rich crystalline phases, were embedded in a CuAgLa-based amorphous matrix. The particular solidification structure in melt-spun ribbons can be explained by liquid-phase separation to form major CuAgLa-rich and minor Fe-rich liquids, an amorphous phase formation in major CuAgLa-rich liquid, and the crystallization of the separated Fe-rich liquid globules during the cooling of the thermal melt. The melt-spun ribbon shows typical ferromagnetic magnetic properties caused by the 10 nm-ordered spherical BCC-Fe nanocrystals.

KW - Amorphous alloy

KW - Electron microscopy

KW - Magnetic property

KW - Microstructure

KW - Rapid solidification

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