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 journalConference 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 languageEnglish
Pages (from-to)92-98
Number of pages7
JournalMaterials Research Society Symposium Proceedings
Volume1032
Publication statusPublished - 2008 Dec 1
EventNanoscale Magnetic Materials and Applications - Boston, MA, United States
Duration: 2007 Nov 262007 Nov 30

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method'. Together they form a unique fingerprint.

  • Cite this