Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method

Tomokazu Fukuzaki; Keisuke Tanaka; Kazue Nishimoto; Yuji Muro; Keishi Nishio; Ryuji Tamura

Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method

Tomokazu Fukuzaki, Keisuke Tanaka, Kazue Nishimoto, Yuji Muro, Keishi Nishio, Ryuji Tamura

Research output: Contribution to journal › Conference article › peer-review

Abstract

We have prepared Nd₂Fe₁₄B/Fe₃B bulk nanocomposite magnets at the compositions Nd₄Fe_77.5B _18.5-xM_x (M=Si, C) by substituting other elements M for B. For the sample substituted with 1 at.%Si, the coercivity exhibits the highest value of 227 kA/m when sintered at 600 °C. In addition, the grain sizes of the Nd₂Fe₁₄B and the Fe₃B phases are found to depend on the ramp-up time during sintering and the reduction of the grain size leads to an increase of the coercivity. On the other hand, the samples substituted with C exhibit soft magnetic behaviors, which is attributed to the suppression of the Nd₂Fe₁₄B hard phase.

Original language	English
Pages (from-to)	92-98
Number of pages	7
Journal	Materials Research Society Symposium Proceedings
Volume	1032
Publication status	Published - 2008
Event	Nanoscale Magnetic Materials and Applications - Boston, MA, United States Duration: 2007 Nov 26 → 2007 Nov 30

ASJC Scopus subject areas

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

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Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method. / Fukuzaki, Tomokazu; Tanaka, Keisuke; Nishimoto, Kazue; Muro, Yuji; Nishio, Keishi; Tamura, Ryuji.

In: Materials Research Society Symposium Proceedings, Vol. 1032, 2008, p. 92-98.

Research output: Contribution to journal › Conference article › peer-review

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title = "Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method",

abstract = "We have prepared Nd2Fe14B/Fe3B bulk nanocomposite magnets at the compositions Nd4Fe77.5B 18.5-xMx (M=Si, C) by substituting other elements M for B. For the sample substituted with 1 at.%Si, the coercivity exhibits the highest value of 227 kA/m when sintered at 600 °C. In addition, the grain sizes of the Nd2Fe14B and the Fe3B phases are found to depend on the ramp-up time during sintering and the reduction of the grain size leads to an increase of the coercivity. On the other hand, the samples substituted with C exhibit soft magnetic behaviors, which is attributed to the suppression of the Nd2Fe14B hard phase.",

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T1 - Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method

AU - Fukuzaki, Tomokazu

AU - Tanaka, Keisuke

AU - Nishimoto, Kazue

AU - Muro, Yuji

AU - Nishio, Keishi

AU - Tamura, Ryuji

PY - 2008

Y1 - 2008

N2 - We have prepared Nd2Fe14B/Fe3B bulk nanocomposite magnets at the compositions Nd4Fe77.5B 18.5-xMx (M=Si, C) by substituting other elements M for B. For the sample substituted with 1 at.%Si, the coercivity exhibits the highest value of 227 kA/m when sintered at 600 °C. In addition, the grain sizes of the Nd2Fe14B and the Fe3B phases are found to depend on the ramp-up time during sintering and the reduction of the grain size leads to an increase of the coercivity. On the other hand, the samples substituted with C exhibit soft magnetic behaviors, which is attributed to the suppression of the Nd2Fe14B hard phase.

AB - We have prepared Nd2Fe14B/Fe3B bulk nanocomposite magnets at the compositions Nd4Fe77.5B 18.5-xMx (M=Si, C) by substituting other elements M for B. For the sample substituted with 1 at.%Si, the coercivity exhibits the highest value of 227 kA/m when sintered at 600 °C. In addition, the grain sizes of the Nd2Fe14B and the Fe3B phases are found to depend on the ramp-up time during sintering and the reduction of the grain size leads to an increase of the coercivity. On the other hand, the samples substituted with C exhibit soft magnetic behaviors, which is attributed to the suppression of the Nd2Fe14B hard phase.

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T2 - Nanoscale Magnetic Materials and Applications

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Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method

Abstract

ASJC Scopus subject areas

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