The Effects of Surface Modification on the Properties of Bonded NdFeB Magnets

Liu, Wei; Yang, Yuangang; Meng, Yan; Wu, Jinglei

doi:10.2320/matertrans.44.1159

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…Applying a silane coupling agent to coat Nd–Fe–B powders offers the necessary resistance to oxidation and corrosion during processing. Various silane agents can be utilised to treat the surface of Nd–Fe–B, such as tetraethoxysilane [ 16 ], N -(2-aminoethyl)-3-aminopropyltrimethoxysilane [ 17 ], 3-aminopropyltriethoxysilane [ 18 ] and (3-glycidoxypropyl)trimethoxysilane [ 19 ]. These silane agents play a crucial role in enhancing the stability and protective properties of the surface of Nd–Fe–B powders, ensuring their suitability under the intended processing conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties and environmental stability of polymer-bonded magnets using three-step surface wet chemical modifications of Nd–Fe–B magnetic powder

Damnjanović,

Milošev,

Kovačević

2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties and environmental stability of polymer-bonded magnets using three-step surface wet chemical modifications of Nd–Fe–B magnetic powder

Damnjanović,

Milošev,

Kovačević

2024

Heliyon

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“…Conventional methods to improve adhesion in polymer-bonded magnets include the surface treatment of the magnetic powder. For instance, passivation pre-treatment, such as phosphatizing [18] or chromatizating [19], followed by coating magnetic powders in an aqueous solution of silanes [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

Damnjanović

Kovačević

2023

Materials

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In this research, the feasibility of additive manufacturing of permanent bonded magnets using fused deposition modelling (FDM) technology was investigated. The study employed polyamide 12 (PA12) as the polymer matrix and melt-spun and gas-atomized Nd–Fe–B powders as magnetic fillers. The effect of the magnetic particle shape and the filler fraction on the magnetic properties and environmental stability of polymer-bonded magnets (PBMs) was investigated. It was found that filaments for FDM made with gas-atomized magnetic particles were easier to print due to their superior flowability. As a result, the printed samples exhibited higher density and lower porosity when compared to those made with melt-spun powders. Magnets with gas-atomized powders and a filler loading of 93 wt.% showed a remanence (Br) of 426 mT, coercivity (Hci) of 721 kA/m, and energy product (BHmax) of 29 kJ/m3, while melt-spun magnets with the same filler loading had a remanence of 456 mT, coercivity of 713 kA/m, and energy product of 35 kJ/m3. The study further demonstrated the exceptional corrosion resistance and thermal stability of FDM-printed magnets, with less than 5% irreversible flux loss when exposed to hot water or air at 85 °C for over 1000 h. These findings highlight the potential of FDM printing for producing high-performance magnets and the versatility of this manufacturing method for various applications.

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“…Silane coupling agents are widely used for metal pre-treatment based on their non-toxicity, low cost, and excellent adhesion. 24,25) There are many types of silane coupling agents with different pre-treatment processes and applicability. The silane coupling agent KH-560, which is often applied between metals and organic polymers, was optimised in this study.…”

Section: Introductionmentioning

confidence: 99%

Bonding Properties between Hot-Dip Coated Steel Strip and Polyethylene in Corrugated Pipe

et al. 2020

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We studied the effects of different types of hot-dip coatings and passivation treatments on cross-sectional morphology, adhesion to polyethylene (PE), and bonding energy. The results revealed that the bonding force of a hot-dip ZnAl coating on a steel strip to PE is 196.3 N. The adhesion of ZnAl and ZnAlMg to PE before passivation was increased by 84.6% and ¹31.1% higher than that of Zn and PE. After passivation, the adhesion of ZnAl and ZnAlMg to PE was increased by 63.8% and ¹46.6% higher than that of Zn and PE, respectively. Passivation treatment can effectively improve the bonding between hot-dip coatings and PE. The bonding strengths of the hot-dipped Zn, ZnAl, and ZnAlMg to PE increased by 73.3%, 26.6%, and 33.3%, respectively, following passivation. The application of a silane coupling agent to the passivator formed chemical bonds on the surface of the hot-dip coatings, which improved the adhesion between the coatings and resin. Overall, utilising a hot-dip ZnAl coating instead of a pure zinc coating (containing 0.01% Al) can improve the adhesion between the coating and PE in steel-strip-reinforced PE spiral-corrugated pipe (MRP), thereby improving the application performance of the MRP.

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The Effects of Surface Modification on the Properties of Bonded NdFeB Magnets

Cited by 15 publications

References 6 publications

Enhanced mechanical properties and environmental stability of polymer-bonded magnets using three-step surface wet chemical modifications of Nd–Fe–B magnetic powder

Enhanced mechanical properties and environmental stability of polymer-bonded magnets using three-step surface wet chemical modifications of Nd–Fe–B magnetic powder

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

Bonding Properties between Hot-Dip Coated Steel Strip and Polyethylene in Corrugated Pipe

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