Effect of process on the magnetic properties of bonded NdFeB magnet

Li, J.; Liu, Y.; Gao, Shangfeng; Li, M.; Wang, Y.Q.; Ming-jing, TU

doi:10.1016/j.jmmm.2005.03.094

Cited by 45 publications

(19 citation statements)

References 11 publications

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“…where J s is the saturation magnetic polarization strength, A is the volume fraction of positive-going magnetic domain, β is the volume fraction of non-magnetic substance, ρ is the practical density of the sample, ρ 0 is the theoretic density of the bonded magnet, cosθ is the orientation factor of magnetic powder particles, and H cj (0) is the intrinsic coercivity of single magnetic domain [6]. To the isotropic Nd-Fe-B bonded magnets, the value of A is 1, and the value of cosθ is 0.5.…”

Section: Densities and Magnetic Propertiesmentioning

confidence: 99%

“…Polymer-bonded magnets are typically obtained by mixing a magnetic powder with a binder such as a thermoplastic polymer at an appropriate mixing ratio in a mixer or extruder and subjecting the pellet-shaped extrudate to injection molding or compression molding [2]. The magnets are thin-walled and permit close tolerances, which facilitate the formation of complex shaped magnets.…”

Section: Introductionmentioning

confidence: 99%

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Effect of bonding process on the properties of isotropic epoxy resin-bonded Nd-Fe-B magnets

Zhang

Xiong

2009

Rare Metals

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Bonded NdFeB magnets were prepared by compression molding. The effect of preparation technology on their magnetic and mechanical properties was studied through the analysis of density, B r , H cj , (BH) max , bending strength, and compressive strength of the bonded magnets. The results showed that the magnetic properties decreased with increasing binder content, whereas the mechanical properties increased. B r and (BH) max increased with rising pressure, whereas H cj decreased. For a fixed mass fraction of the binder, the optimal pressure was 620 MPa and the best thermosetting temperature was 160°C. These conditions made the bonded magnets have the optimal mechanical properties. Scanning electron microscopy (SEM) analyses of the fracture surfaces indicated that the epoxy resin bonded magnets exhibited brittle behavior.

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Section: Densities and Magnetic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of bonding process on the properties of isotropic epoxy resin-bonded Nd-Fe-B magnets

Zhang

Xiong

2009

Rare Metals

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“…The Nd-Fe-B bonded magnets have been commonly used in various fields, such as electric appliances, automobile parts Li et al, 2006), sensing elements (Radojević et al, 2007), electronic, communication and micro-electro-mechanical system (MEMS) applications (Chin, 2000;Hono & Ping, 2001). Advantages of the using bonded composite materials include their simple technology, possibility of forming their final properties, lowering manufacturing costs because of no costly finishing and lowering of material losses resulting from the possibility of forming any shape (Dobrzanski et al 2007).…”

Section: Nd-fe-b / Epoxy Composite Magnetic Materials -Bonded Magnetsmentioning

confidence: 99%

Magnetic and Dynamic Mechanical Properties of Nd-Fe-B Composite Materials with Polymer Matrix

Stajić-Trošić¹,

Stijepović²,

Stevanović³

et al. 2011

Metal, Ceramic and Polymeric Composites for Various Uses

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“…NdFeB bonded magnets are important functional materials and have been widely used for decades in various applications due to their good magnetic properties [8][9][10][11]. However, the coercivity temperature coefficient of NdFeB bonded magnets is about -0.4 %ÁK -1 , which restricts the use of NdFeB bonded magnets at elevated temperatures [12], such as in electric motors.…”

Section: Introductionmentioning

confidence: 99%

High-temperature magnetic properties of anisotropic MnBi/NdFeB hybrid bonded magnets

et al. 2015

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Anisotropic MnBi/NdFeB (MnBi contents of 0 wt%, 20 wt%, 40 wt%, 60 wt%, 80 wt%, and 100 wt%) hybrid bonded magnets were prepared by molding compression using MnBi powders and commercial hydrogenation disproportionation desorption and recombination (HDDR) NdFeB powders. Magnetic measurements at room temperature show that with MnBi content increasing, the magnetic properties of the MnBi/NdFeB hybrid bonded magnets all decrease gradually, while the density of the hybrid magnets improves almost linearly. In a temperature range of 293-398 K, the coercivity temperature coefficient of the hybrid magnets improves gradually from -0.59 %ÁK -1 for the pure NdFeB bonded magnet to -0.32 %ÁK -1 for the hybrid bonded magnet with 80 wt% MnBi, and the pure MnBi bonded magnet exhibits a positive coercivity temperature coefficient of 0.61 %ÁK -1 .

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Effect of process on the magnetic properties of bonded NdFeB magnet

Cited by 45 publications

References 11 publications

Effect of bonding process on the properties of isotropic epoxy resin-bonded Nd-Fe-B magnets

Effect of bonding process on the properties of isotropic epoxy resin-bonded Nd-Fe-B magnets

Magnetic and Dynamic Mechanical Properties of Nd-Fe-B Composite Materials with Polymer Matrix

High-temperature magnetic properties of anisotropic MnBi/NdFeB hybrid bonded magnets

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