Relation between microstructure and magnetic properties of shock wave-compressed Nd–Fe–B magnets

Ming Gang Zhu; Yan Feng Li; Wei Li; Li Yun Zheng; Dong Zhou; Hai Bo Feng; Lang Chen; An Du

doi:10.1007/s12598-015-0587-1

Relation between microstructure and magnetic properties of shock wave-compressed Nd–Fe–B magnets

Ming Gang Zhu^*, Yan Feng Li, Wei Li, Li Yun Zheng, Dong Zhou, Hai Bo Feng, Lang Chen, An Du

^*Corresponding author for this work

School of Mechatronical Engineering

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

11 Citations (Scopus)

Abstract

The relationship between the microstructure and magnetic properties of Nd–Fe–B sintered magnet compressed by shock wave with 6.26 GPa ≤ p ≤ 7.16 GPa was investigated. It reveals that Nd–Fe–B magnets show a demagnetization behavior after compressed by shock wave. The intergranular fracture is the main occurring phenomenon in the shock wave-compressed magnets. The coercivity of the shock wave-compressed Nd–Fe–B magnets could be recovered after repeating the annealing process. It suggests that only the morphology change just like the intergranular fracture occurs, and there is no structural change in the grain boundary phase in the shock wave-compressed magnet. Matrix phase grain interconnection, microcracks and pores, and alterant orientation relationship between matrix phase and grain boundaries phase are considered as induced factors of demagnetization.

Original language	English
Pages (from-to)	2353-2356
Number of pages	4
Journal	Rare Metals
Volume	41
Issue number	7
DOIs	https://doi.org/10.1007/s12598-015-0587-1
Publication status	Published - Jul 2022

Keywords

Coercivity
Demagnetization
Permanent magnets
Shock wave

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10.1007/s12598-015-0587-1

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title = "Relation between microstructure and magnetic properties of shock wave-compressed Nd–Fe–B magnets",

abstract = "The relationship between the microstructure and magnetic properties of Nd–Fe–B sintered magnet compressed by shock wave with 6.26 GPa ≤ p ≤ 7.16 GPa was investigated. It reveals that Nd–Fe–B magnets show a demagnetization behavior after compressed by shock wave. The intergranular fracture is the main occurring phenomenon in the shock wave-compressed magnets. The coercivity of the shock wave-compressed Nd–Fe–B magnets could be recovered after repeating the annealing process. It suggests that only the morphology change just like the intergranular fracture occurs, and there is no structural change in the grain boundary phase in the shock wave-compressed magnet. Matrix phase grain interconnection, microcracks and pores, and alterant orientation relationship between matrix phase and grain boundaries phase are considered as induced factors of demagnetization.",

keywords = "Coercivity, Demagnetization, Permanent magnets, Shock wave",

author = "Zhu, {Ming Gang} and Li, {Yan Feng} and Wei Li and Zheng, {Li Yun} and Dong Zhou and Feng, {Hai Bo} and Lang Chen and An Du",

note = "Publisher Copyright: {\textcopyright} 2015, The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg.",

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T1 - Relation between microstructure and magnetic properties of shock wave-compressed Nd–Fe–B magnets

AU - Zhu, Ming Gang

AU - Li, Yan Feng

AU - Li, Wei

AU - Zheng, Li Yun

AU - Zhou, Dong

AU - Feng, Hai Bo

AU - Chen, Lang

AU - Du, An

PY - 2022/7

Y1 - 2022/7

N2 - The relationship between the microstructure and magnetic properties of Nd–Fe–B sintered magnet compressed by shock wave with 6.26 GPa ≤ p ≤ 7.16 GPa was investigated. It reveals that Nd–Fe–B magnets show a demagnetization behavior after compressed by shock wave. The intergranular fracture is the main occurring phenomenon in the shock wave-compressed magnets. The coercivity of the shock wave-compressed Nd–Fe–B magnets could be recovered after repeating the annealing process. It suggests that only the morphology change just like the intergranular fracture occurs, and there is no structural change in the grain boundary phase in the shock wave-compressed magnet. Matrix phase grain interconnection, microcracks and pores, and alterant orientation relationship between matrix phase and grain boundaries phase are considered as induced factors of demagnetization.

AB - The relationship between the microstructure and magnetic properties of Nd–Fe–B sintered magnet compressed by shock wave with 6.26 GPa ≤ p ≤ 7.16 GPa was investigated. It reveals that Nd–Fe–B magnets show a demagnetization behavior after compressed by shock wave. The intergranular fracture is the main occurring phenomenon in the shock wave-compressed magnets. The coercivity of the shock wave-compressed Nd–Fe–B magnets could be recovered after repeating the annealing process. It suggests that only the morphology change just like the intergranular fracture occurs, and there is no structural change in the grain boundary phase in the shock wave-compressed magnet. Matrix phase grain interconnection, microcracks and pores, and alterant orientation relationship between matrix phase and grain boundaries phase are considered as induced factors of demagnetization.

KW - Coercivity

KW - Demagnetization

KW - Permanent magnets

KW - Shock wave

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EP - 2356

JO - Rare Metals

JF - Rare Metals

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ER -

Relation between microstructure and magnetic properties of shock wave-compressed Nd–Fe–B magnets

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Keywords

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