Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets

D. Prabhu; H. Sepehri-Amin; C. L. Mendis; T. Ohkubo; K. Hono; S. Sugimoto

doi:10.1016/j.scriptamat.2012.04.001

Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets

D. Prabhu, H. Sepehri-Amin, C. L. Mendis, T. Ohkubo, K. Hono, S. Sugimoto

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

24 Citations (Scopus)

Abstract

A high-coercivity Zn-bonded Sm-Fe-N magnet is synthesized using spark plasma sintering. Optimal post-sinter annealing results in a large coercivity of μ ₀H _c = 2.75 T. Transmission electron microscopy and atom probe tomography revealed the formation of a Sm-Fe-Zn-N phase on the particle surface and the presence of Fe ₃Zn ₁₀ at the grain boundaries, which are believed to be the cause of the enhanced coercivity.

Original language	English
Pages (from-to)	153-156
Number of pages	4
Journal	Scripta Materialia
Volume	67
Issue number	2
DOIs	https://doi.org/10.1016/j.scriptamat.2012.04.001
Publication status	Published - 2012 Jul
Externally published	Yes

Keywords

Atom probe tomography
Coercivity
Permanent magnet
Sm-Fe-N

ASJC Scopus subject areas

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

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10.1016/j.scriptamat.2012.04.001

Cite this

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title = "Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets",

abstract = "A high-coercivity Zn-bonded Sm-Fe-N magnet is synthesized using spark plasma sintering. Optimal post-sinter annealing results in a large coercivity of μ 0H c = 2.75 T. Transmission electron microscopy and atom probe tomography revealed the formation of a Sm-Fe-Zn-N phase on the particle surface and the presence of Fe 3Zn 10 at the grain boundaries, which are believed to be the cause of the enhanced coercivity.",

keywords = "Atom probe tomography, Coercivity, Permanent magnet, Sm-Fe-N",

author = "D. Prabhu and H. Sepehri-Amin and Mendis, {C. L.} and T. Ohkubo and K. Hono and S. Sugimoto",

note = "Funding Information: This work was supported by the Research and Development of Alternative New Permanent Magnetic Materials to Nd–Fe–B Magnets Project, NEDO . H.S.A. acknowledges International Center for Young Scientists (ICYS), NIMS for provision of the ICYS fellowship.",

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doi = "10.1016/j.scriptamat.2012.04.001",

language = "English",

volume = "67",

pages = "153--156",

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T1 - Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets

AU - Prabhu, D.

AU - Sepehri-Amin, H.

AU - Mendis, C. L.

AU - Ohkubo, T.

AU - Hono, K.

AU - Sugimoto, S.

N1 - Funding Information: This work was supported by the Research and Development of Alternative New Permanent Magnetic Materials to Nd–Fe–B Magnets Project, NEDO . H.S.A. acknowledges International Center for Young Scientists (ICYS), NIMS for provision of the ICYS fellowship.

PY - 2012/7

Y1 - 2012/7

N2 - A high-coercivity Zn-bonded Sm-Fe-N magnet is synthesized using spark plasma sintering. Optimal post-sinter annealing results in a large coercivity of μ 0H c = 2.75 T. Transmission electron microscopy and atom probe tomography revealed the formation of a Sm-Fe-Zn-N phase on the particle surface and the presence of Fe 3Zn 10 at the grain boundaries, which are believed to be the cause of the enhanced coercivity.

AB - A high-coercivity Zn-bonded Sm-Fe-N magnet is synthesized using spark plasma sintering. Optimal post-sinter annealing results in a large coercivity of μ 0H c = 2.75 T. Transmission electron microscopy and atom probe tomography revealed the formation of a Sm-Fe-Zn-N phase on the particle surface and the presence of Fe 3Zn 10 at the grain boundaries, which are believed to be the cause of the enhanced coercivity.

KW - Atom probe tomography

KW - Coercivity

KW - Permanent magnet

KW - Sm-Fe-N

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DO - 10.1016/j.scriptamat.2012.04.001

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JO - Scripta Materialia

JF - Scripta Materialia

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Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets

Abstract

Keywords

ASJC Scopus subject areas

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