Effects of Cu nanopowders addition on magnetic properties and corrosion resistance of sintered Nd-Fe-B magnets

X. G. Cui; M. Yan; T. Y. Ma; L. Q. Yu

doi:10.1016/j.physb.2008.09.002

Effects of Cu nanopowders addition on magnetic properties and corrosion resistance of sintered Nd-Fe-B magnets

X. G. Cui
, M. Yan
, T. Y. Ma
, L. Q. Yu

Zhejiang University

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

50 Scopus citations

Abstract

Sintered permanent magnets have been prepared by blending Nd-Fe-B jet-milled powders with Cu nanopowders (0, 0.05, 0.1 and 0.2 wt%) before pressing in a perpendicular magnetic field. Permanent magnetic properties, Curie temperature (T_c), microstructures and corrosion resistance of the sintered magnets were investigated. Microstructural characterization revealed that the grain size of Nd₂Fe₁₄B phase was refined and more homogeneous, and the grain boundaries became clear and smooth by the addition of Cu nanopowders, resulting in the improvement of coercivity H_cj. Moreover, the corrosion resistance of Nd-Fe-B magnets was also improved. However, T_c remained nearly unchanged with Cu addition, which was consistent with the elemental analysis results. Cu was not detected in the matrix phase Nd₂Fe₁₄B, but concentrated in the intergranular region.

Original language	English
Pages (from-to)	4182-4185
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	403
Issue number	23-24
DOIs	https://doi.org/10.1016/j.physb.2008.09.002
State	Published - 15 Dec 2008
Externally published	Yes

Keywords

Corrosion resistance
Cu nanopowders
Magnetic properties
Sintered Nd-Fe-B magnets

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10.1016/j.physb.2008.09.002

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@article{3b91a9e33c7a46fb8df5cce0a68afcdb,

title = "Effects of Cu nanopowders addition on magnetic properties and corrosion resistance of sintered Nd-Fe-B magnets",

abstract = "Sintered permanent magnets have been prepared by blending Nd-Fe-B jet-milled powders with Cu nanopowders (0, 0.05, 0.1 and 0.2 wt\%) before pressing in a perpendicular magnetic field. Permanent magnetic properties, Curie temperature (Tc), microstructures and corrosion resistance of the sintered magnets were investigated. Microstructural characterization revealed that the grain size of Nd2Fe14B phase was refined and more homogeneous, and the grain boundaries became clear and smooth by the addition of Cu nanopowders, resulting in the improvement of coercivity Hcj. Moreover, the corrosion resistance of Nd-Fe-B magnets was also improved. However, Tc remained nearly unchanged with Cu addition, which was consistent with the elemental analysis results. Cu was not detected in the matrix phase Nd2Fe14B, but concentrated in the intergranular region.",

keywords = "Corrosion resistance, Cu nanopowders, Magnetic properties, Sintered Nd-Fe-B magnets",

author = "Cui, \{X. G.\} and M. Yan and Ma, \{T. Y.\} and Yu, \{L. Q.\}",

year = "2008",

month = dec,

day = "15",

doi = "10.1016/j.physb.2008.09.002",

language = "英语",

volume = "403",

pages = "4182--4185",

journal = "Physica B: Condensed Matter",

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publisher = "Elsevier B.V.",

number = "23-24",

}

TY - JOUR

T1 - Effects of Cu nanopowders addition on magnetic properties and corrosion resistance of sintered Nd-Fe-B magnets

AU - Cui, X. G.

AU - Yan, M.

AU - Ma, T. Y.

AU - Yu, L. Q.

PY - 2008/12/15

Y1 - 2008/12/15

N2 - Sintered permanent magnets have been prepared by blending Nd-Fe-B jet-milled powders with Cu nanopowders (0, 0.05, 0.1 and 0.2 wt%) before pressing in a perpendicular magnetic field. Permanent magnetic properties, Curie temperature (Tc), microstructures and corrosion resistance of the sintered magnets were investigated. Microstructural characterization revealed that the grain size of Nd2Fe14B phase was refined and more homogeneous, and the grain boundaries became clear and smooth by the addition of Cu nanopowders, resulting in the improvement of coercivity Hcj. Moreover, the corrosion resistance of Nd-Fe-B magnets was also improved. However, Tc remained nearly unchanged with Cu addition, which was consistent with the elemental analysis results. Cu was not detected in the matrix phase Nd2Fe14B, but concentrated in the intergranular region.

AB - Sintered permanent magnets have been prepared by blending Nd-Fe-B jet-milled powders with Cu nanopowders (0, 0.05, 0.1 and 0.2 wt%) before pressing in a perpendicular magnetic field. Permanent magnetic properties, Curie temperature (Tc), microstructures and corrosion resistance of the sintered magnets were investigated. Microstructural characterization revealed that the grain size of Nd2Fe14B phase was refined and more homogeneous, and the grain boundaries became clear and smooth by the addition of Cu nanopowders, resulting in the improvement of coercivity Hcj. Moreover, the corrosion resistance of Nd-Fe-B magnets was also improved. However, Tc remained nearly unchanged with Cu addition, which was consistent with the elemental analysis results. Cu was not detected in the matrix phase Nd2Fe14B, but concentrated in the intergranular region.

KW - Corrosion resistance

KW - Cu nanopowders

KW - Magnetic properties

KW - Sintered Nd-Fe-B magnets

UR - https://www.scopus.com/pages/publications/56449086108

U2 - 10.1016/j.physb.2008.09.002

DO - 10.1016/j.physb.2008.09.002

M3 - 文章

AN - SCOPUS:56449086108

SN - 0921-4526

VL - 403

SP - 4182

EP - 4185

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 23-24

ER -

Effects of Cu nanopowders addition on magnetic properties and corrosion resistance of sintered Nd-Fe-B magnets

Abstract

Keywords

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