Investigation on Properties of Electroless Ni-P-W/Al2O3 Composite Coatings Deposited on Sintered NdFeB Permanent Magnet

Dong Yang; Xin Xin Lin; Huan Ming Chen; Ya Hong Gao; Qiong Lv; Yan Qing Wang

doi:10.4028/www.scientific.net/AMR.476-478.397

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 476-478Investigation on Properties of Electroless...

Investigation on Properties of Electroless Ni-P-W/Al₂O₃ Composite Coatings Deposited on Sintered NdFeB Permanent Magnet

Abstract:

The Ni-P-W/Al₂O₃ composite coatings were deposited on the surface of sintered NdFeB permanent magnet by electroless plating method. The morphology and the phases of Ni-P-W/Al₂O₃ composite coatings were investigated using scanning electron microscopy and X-ray diffraction respectively. The hardness and the corrosion resistance of the composite coatings were also tested. The results indicated that the composite coatings morphology appears closely nodules morphology, and the microhardness increases linearly with increasing incorporation of Al₂O₃ ratio. Compared with NdFeB magnet and Ni-P-W amorphous alloy coating, the corrosion resistance of the composite coatings was superior to that of the NdFeB magnet and the amorphous alloy coating obviously. However, for the corrosion resistance of Ni-P-W/Al₂O₃ composite coatings with different Al₂O₃ concentration, there is not a linear increase with the Al₂O₃ concentration increasing. The self-corrosion potential of Ni-P-W/Al₂O₃ composite coatings reaches the highest value while increasing incorporation of Al₂O₃ ratio up to 10 g/L.

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Periodical:

Advanced Materials Research (Volumes 476-478)

Pages:

397-401

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.476-478.397

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Online since:

February 2012

Authors:

Dong Yang, Xin Xin Lin, Huan Ming Chen, Ya Hong Gao, Qiong Lv, Yan Qing Wang

Keywords:

Electroless Plating (EP), NdFeB Permanent Magnet, Ni-P-W/Al₂O₃ Composite Coatings

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