Multi-layered electroless Ni–P coatings on powder-sintered Nd–Fe–B permanent magnet

Zhong, Cheng; Ng, Aik Seng; Yi, Jianzhang; Chen, Xingfu

doi:10.1016/j.jmmm.2005.09.008

Cited by 59 publications

(23 citation statements)

References 15 publications

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“…A 10-µm thick nickel coating layer is then deposited by electroless plating to act as an oxidation barrier. The corrosion resistance efficacy of this layer is tested by immersing the magnet in an HCl bath to accelerate the potential damage, and by tracking the weight loss of the PM pieces as a function of time [5]. Results in Fig.…”

Section: Miniaturization Constraintsmentioning

confidence: 99%

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Herrault

Shafer

et al. 2007

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference

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This paper reports the design, fabrication and experimental characterization of ultraminiaturized, axial-flux, permanent-magnet (PM) generators intended for milliwatt range systems. The miniaturization of PM machines is attractive because scaling laws are favorable, but integration of ultra-small permanent magnets is challenging. The generators are 2-pole, multi-turn, 2-mm diameter machines. A single-phase, open-circuit voltage of 51mV rms has been measured at 392krpm, which approximately corresponds to 3.6mW of DC power to a load resistance at the point of maximum power transfer, indicating that this approach shows great promises for milliwatt-scale power devices.

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Section: Miniaturization Constraintsmentioning

confidence: 99%

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Herrault

Shafer

et al. 2007

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference

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“…Song & Yang 25 prepared Ni-P/TiO 2 coating and reported that it has a better corrosion resistance than Ni-P coating. Chen et al 29 showed a successful multi-layered electroless Ni-P coatings scheme for the protection of sintered NdFeB magnet using multi-layered electroless nickel deposition.…”

Section: Introductionmentioning

confidence: 99%

Electroless Plating of Ni-P-W Coatings Containing Scattered Nb2O5 on Sintered NdFeB Substrate

et al. 2015

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“…Majority of electroless coating studies are limited to Nd-Fe-B powder [14][15][16] and were carried out mainly with a purpose of improving the corrosion resistance of the magnet. However, the use of electroless plating method has not been yet fully explored for the purpose of developing hard-soft exchange-spring magnets [17].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties Hard-Soft SmCo<sub>5</sub>-FeNi and SmCo<sub>5</sub>-FeCo Composites Prepared by Electroless Coating Technique

Lamichanne¹,

Ma²,

Mishra

et al. 2012

OJCM

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Composites of SmCo 5 -FeNi and SmCo 5 -FeCo, hard-soft magnetic materials, have been synthesized via electroless plating of magnetically hard SmCo 5 powder particles with magnetically soft FeNi and FeCo, respectively. The influence of coating thickness of soft magnetic layers on the structure and magnetic properties of the composite has been studied. Overall FeNi coating was found to be less dense compared to FeCo for the same plating duration. Structurally the coat ing was found to be nodular in morphology. These coating have dramatic effect on the overall magnetic property of the composite. As compared to FeNi coated SmCo 5 composite, two-fold increase in the saturation magnetization has been observed upon coating SmCo 5 (M s ~ 28 emu/g) with FeCo to a value 56 emu/g. The coercivity of composite powder was found to decrease with increasing the coating layer thickness. The absence of exchange spring behavior in the hard-soft composite is attributed to magnetically soft layer thickness exceeding the theoretical length limit for exchange-spring coupling.

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Multi-layered electroless Ni–P coatings on powder-sintered Nd–Fe–B permanent magnet

Cited by 59 publications

References 15 publications

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Electroless Plating of Ni-P-W Coatings Containing Scattered Nb2O5 on Sintered NdFeB Substrate

Magnetic Properties Hard-Soft SmCo<sub>5</sub>-FeNi and SmCo<sub>5</sub>-FeCo Composites Prepared by Electroless Coating Technique

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Multi-layered electroless Ni–P coatings on powder-sintered Nd–Fe–B permanent magnet

Cited by 59 publications

References 15 publications

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Ultraminiaturized Milliwatt-Scale Permanent Magnet Generators

Electroless Plating of Ni-P-W Coatings Containing Scattered Nb2O5 on Sintered NdFeB Substrate

Magnetic Properties Hard-Soft SmCo&lt;sub&gt;5&lt;/sub&gt;-FeNi and SmCo&lt;sub&gt;5&lt;/sub&gt;-FeCo Composites Prepared by Electroless Coating Technique

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Magnetic Properties Hard-Soft SmCo<sub>5</sub>-FeNi and SmCo<sub>5</sub>-FeCo Composites Prepared by Electroless Coating Technique