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

Abstract

We have prepared Nd ₂ Fe ₁₄ B/Fe ₃ B bulk nanocomposite magnets at the compositions Nd ₄ Fe _77.5 B _18.5-x M _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 Nd ₂ Fe ₁₄ B and the Fe ₃ B 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 Nd ₂ Fe ₁₄ B 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 Dec 1
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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Fukuzaki, T., Tanaka, K., Nishimoto, K., Muro, Y., Nishio, K., & Tamura, R. (2008). Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method. Materials Research Society Symposium Proceedings, 1032, 92-98.

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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 Nd 2 Fe 14 B/Fe 3 B bulk nanocomposite magnets at the compositions Nd 4 Fe 77.5 B 18.5-x M 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 Nd 2 Fe 14 B and the Fe 3 B 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 Nd 2 Fe 14 B hard phase.",

author = "Tomokazu Fukuzaki and Keisuke Tanaka and Kazue Nishimoto and Yuji Muro and Keishi Nishio and Ryuji Tamura",

year = "2008",

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language = "English",

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pages = "92--98",

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note = "Nanoscale Magnetic Materials and Applications ; Conference date: 26-11-2007 Through 30-11-2007",

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TY - JOUR

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 - 2008/12/1

Y1 - 2008/12/1

N2 - We have prepared Nd 2 Fe 14 B/Fe 3 B bulk nanocomposite magnets at the compositions Nd 4 Fe 77.5 B 18.5-x M 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 Nd 2 Fe 14 B and the Fe 3 B 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 Nd 2 Fe 14 B hard phase.

AB - We have prepared Nd 2 Fe 14 B/Fe 3 B bulk nanocomposite magnets at the compositions Nd 4 Fe 77.5 B 18.5-x M 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 Nd 2 Fe 14 B and the Fe 3 B 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 Nd 2 Fe 14 B hard phase.

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