Exchange coupled Nd2Fe14B/ α-Fe nanocomposite magnets with fine α-Fe grains obtained by low wheel speed spinning

Yang Sen; Li Shandong; Liu Xiansong; Song Xiaoping; Gu Benxi; Du Youwei

doi:10.1016/S0925-8388(02)00137-8

Exchange coupled Nd₂Fe₁₄B/ α-Fe nanocomposite magnets with fine α-Fe grains obtained by low wheel speed spinning

Yang Sen
, Li Shandong
, Liu Xiansong
, Song Xiaoping
, Gu Benxi
, Du Youwei

School of Physics

Nanjing University
Xi'an Jiaotong University

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

22 Scopus citations

Abstract

Exchange coupled Nd₂Fe₁₄B/α-Fe nanocomposite magnets have been synthesized by melt-spinning. The effect of wheel speed on the magnetic properties and microstructure has been studied. The results show that a uniform Nd₂Fe₁₄B/α-Fe nanocomposite structure with fine α-Fe grains can be developed at an optimum wheel speed of about 12 m/s. After a low temperature annealing, the magnetic properties can reach maximum values: _iH_c = 432.2 kA/m, J_r = 1.08 T, (BH)_max = 115 kJ/m³. With further increasing the wheel speed, the volume fraction of an amorphous phase increases. The microstructure of the ribbons becomes nonuniform after a subsequent high temperature crystallization, and several α-Fe grains abnormally grow to about 100 nm, deteriorating the magnetic properties of the ribbons.

Original language	English
Pages (from-to)	217-222
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	343
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(02)00137-8
State	Published - 16 Sep 2002

Keywords

Magnetic measurements
Nanostructured materials
Permanent magnets
Rapid solidification
X-ray diffraction

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10.1016/S0925-8388(02)00137-8

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title = "Exchange coupled Nd2Fe14B/ α-Fe nanocomposite magnets with fine α-Fe grains obtained by low wheel speed spinning",

abstract = "Exchange coupled Nd2Fe14B/α-Fe nanocomposite magnets have been synthesized by melt-spinning. The effect of wheel speed on the magnetic properties and microstructure has been studied. The results show that a uniform Nd2Fe14B/α-Fe nanocomposite structure with fine α-Fe grains can be developed at an optimum wheel speed of about 12 m/s. After a low temperature annealing, the magnetic properties can reach maximum values: iHc = 432.2 kA/m, Jr = 1.08 T, (BH)max = 115 kJ/m3. With further increasing the wheel speed, the volume fraction of an amorphous phase increases. The microstructure of the ribbons becomes nonuniform after a subsequent high temperature crystallization, and several α-Fe grains abnormally grow to about 100 nm, deteriorating the magnetic properties of the ribbons.",

keywords = "Magnetic measurements, Nanostructured materials, Permanent magnets, Rapid solidification, X-ray diffraction",

author = "Yang Sen and Li Shandong and Liu Xiansong and Song Xiaoping and Gu Benxi and Du Youwei",

year = "2002",

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doi = "10.1016/S0925-8388(02)00137-8",

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TY - JOUR

T1 - Exchange coupled Nd2Fe14B/ α-Fe nanocomposite magnets with fine α-Fe grains obtained by low wheel speed spinning

AU - Sen, Yang

AU - Shandong, Li

AU - Xiansong, Liu

AU - Xiaoping, Song

AU - Benxi, Gu

AU - Youwei, Du

PY - 2002/9/16

Y1 - 2002/9/16

N2 - Exchange coupled Nd2Fe14B/α-Fe nanocomposite magnets have been synthesized by melt-spinning. The effect of wheel speed on the magnetic properties and microstructure has been studied. The results show that a uniform Nd2Fe14B/α-Fe nanocomposite structure with fine α-Fe grains can be developed at an optimum wheel speed of about 12 m/s. After a low temperature annealing, the magnetic properties can reach maximum values: iHc = 432.2 kA/m, Jr = 1.08 T, (BH)max = 115 kJ/m3. With further increasing the wheel speed, the volume fraction of an amorphous phase increases. The microstructure of the ribbons becomes nonuniform after a subsequent high temperature crystallization, and several α-Fe grains abnormally grow to about 100 nm, deteriorating the magnetic properties of the ribbons.

AB - Exchange coupled Nd2Fe14B/α-Fe nanocomposite magnets have been synthesized by melt-spinning. The effect of wheel speed on the magnetic properties and microstructure has been studied. The results show that a uniform Nd2Fe14B/α-Fe nanocomposite structure with fine α-Fe grains can be developed at an optimum wheel speed of about 12 m/s. After a low temperature annealing, the magnetic properties can reach maximum values: iHc = 432.2 kA/m, Jr = 1.08 T, (BH)max = 115 kJ/m3. With further increasing the wheel speed, the volume fraction of an amorphous phase increases. The microstructure of the ribbons becomes nonuniform after a subsequent high temperature crystallization, and several α-Fe grains abnormally grow to about 100 nm, deteriorating the magnetic properties of the ribbons.

KW - Magnetic measurements

KW - Nanostructured materials

KW - Permanent magnets

KW - Rapid solidification

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/0037119871

U2 - 10.1016/S0925-8388(02)00137-8

DO - 10.1016/S0925-8388(02)00137-8

M3 - 文章

AN - SCOPUS:0037119871

SN - 0925-8388

VL - 343

SP - 217

EP - 222

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Exchange coupled Nd₂Fe₁₄B/ α-Fe nanocomposite magnets with fine α-Fe grains obtained by low wheel speed spinning

Abstract

Keywords

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