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

Center for Exploration of New Inorganic Materials

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

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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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