Nanocrystallization and magnetic properties of Fe56Co7Ni7Zr2M8B 20(M=Nb or Ta) glassy alloys

H. Koshiba; A. Inoue; A. Makino

doi:10.1016/S0965-9773(98)00037-3

Nanocrystallization and magnetic properties of Fe₅₆Co₇Ni₇Zr₂M₈B ₂₀(M=Nb or Ta) glassy alloys

H. Koshiba, A. Inoue, A. Makino

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

8 Citations (Scopus)

Abstract

Glassy alloys with a wide supercooled liquid region before crystallization were found in melt-spun Fe₅₆Co₇Ni₇Zr₂M₈B ₂₀ (M= Nb or Ta) alloys. The temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (T_g) and crystallization temperature (T_x), ΔT_x(=T_x-T_g) is about 60 K for these alloys. The crystallization occurs through distinct two stages. The crystallization behavior seems to reflect the existence of Fe₂(M,Zr) phase resulting from the weaker bonding nature of Fe-M pair as compared with Fe-Zr pair. Good soft magnetic properties are obtained in the annealed state for 30Os at 800K below T_g for these alloys. Saturation magnetization (I_s), coercive force (H_c) and effective permeability (μ_e) at l kHz are about 0.8T, 2A/m and 18000, respectively. The above-mentioned glassy alloys with wide supercooled liquid region and good soft magnetic properties have a strong possibility of producing soft magnetic bulk amorphous alloys.

Original language	English
Pages (from-to)	997-1005
Number of pages	9
Journal	Nanostructured Materials
Volume	8
Issue number	8
DOIs	https://doi.org/10.1016/S0965-9773(98)00037-3
Publication status	Published - 1997 Dec
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "Nanocrystallization and magnetic properties of Fe56Co7Ni7Zr2M8B 20(M=Nb or Ta) glassy alloys",

abstract = "Glassy alloys with a wide supercooled liquid region before crystallization were found in melt-spun Fe56Co7Ni7Zr2M8B 20 (M= Nb or Ta) alloys. The temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), ΔTx(=Tx-Tg) is about 60 K for these alloys. The crystallization occurs through distinct two stages. The crystallization behavior seems to reflect the existence of Fe2(M,Zr) phase resulting from the weaker bonding nature of Fe-M pair as compared with Fe-Zr pair. Good soft magnetic properties are obtained in the annealed state for 30Os at 800K below Tg for these alloys. Saturation magnetization (Is), coercive force (Hc) and effective permeability (μe) at l kHz are about 0.8T, 2A/m and 18000, respectively. The above-mentioned glassy alloys with wide supercooled liquid region and good soft magnetic properties have a strong possibility of producing soft magnetic bulk amorphous alloys.",

author = "H. Koshiba and A. Inoue and A. Makino",

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AU - Koshiba, H.

AU - Inoue, A.

AU - Makino, A.

PY - 1997/12

Y1 - 1997/12

N2 - Glassy alloys with a wide supercooled liquid region before crystallization were found in melt-spun Fe56Co7Ni7Zr2M8B 20 (M= Nb or Ta) alloys. The temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), ΔTx(=Tx-Tg) is about 60 K for these alloys. The crystallization occurs through distinct two stages. The crystallization behavior seems to reflect the existence of Fe2(M,Zr) phase resulting from the weaker bonding nature of Fe-M pair as compared with Fe-Zr pair. Good soft magnetic properties are obtained in the annealed state for 30Os at 800K below Tg for these alloys. Saturation magnetization (Is), coercive force (Hc) and effective permeability (μe) at l kHz are about 0.8T, 2A/m and 18000, respectively. The above-mentioned glassy alloys with wide supercooled liquid region and good soft magnetic properties have a strong possibility of producing soft magnetic bulk amorphous alloys.

AB - Glassy alloys with a wide supercooled liquid region before crystallization were found in melt-spun Fe56Co7Ni7Zr2M8B 20 (M= Nb or Ta) alloys. The temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), ΔTx(=Tx-Tg) is about 60 K for these alloys. The crystallization occurs through distinct two stages. The crystallization behavior seems to reflect the existence of Fe2(M,Zr) phase resulting from the weaker bonding nature of Fe-M pair as compared with Fe-Zr pair. Good soft magnetic properties are obtained in the annealed state for 30Os at 800K below Tg for these alloys. Saturation magnetization (Is), coercive force (Hc) and effective permeability (μe) at l kHz are about 0.8T, 2A/m and 18000, respectively. The above-mentioned glassy alloys with wide supercooled liquid region and good soft magnetic properties have a strong possibility of producing soft magnetic bulk amorphous alloys.

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Nanocrystallization and magnetic properties of Fe₅₆Co₇Ni₇Zr₂M₈B ₂₀(M=Nb or Ta) glassy alloys

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