Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet

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	Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet
	Y. Wang ; Y. Z. Deng ; Y. T. Ma ; F. Gao
刊名	Surface & Coatings Technology
	2011
卷号	206 期号:6 页码:1203-1210
关键词	NdFeB sintered magnet Adhesion strength Zn phosphate film fe-b magnets corrosion protection permanent-magnets electrochemical-behavior surface-coatings nd resistance microstructure alloys co
ISSN号	0257-8972
中文摘要	The poor adhesion of Ni-P coatings on sintered NdFeB magnets imposes a great challenge in industrial applications. In this work, a kind of Zn phosphate film was fabricated on NdFeB sintered magnets surface to enhance the adhesion strength between the Ni-P coating and the substrate. The results showed that the adhesion strength between magnet surface and Ni-P coating was enhanced from 23 MPa to 10.1 MPa after Zn phosphating treatment. The addition of the phosphate created a protective layer over the substrate and inhibited the dissolving of the substrate and generation of H(2), which deteriorated the mechanical strength of the substrate and led to lower adhesion strength. On the other hand, the pores and micro-cracks on the phosphate film enhanced the interfacial contact area as well as reinforced the anchoring of Ni-P grains through the pinning effect, thus leading to high adhesion strength between Ni-P and magnet substrate. Phosphating solution composition and process were also optimized by orthogonal experiments in this work. (C) 2011 Elsevier B.V. All rights reserved.
原文出处	://WOS:000297825600025
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30754]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,Y. Z. Deng,Y. T. Ma,et al. Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet[J]. Surface & Coatings Technology,2011,206(6):1203-1210.
APA	Y. Wang,Y. Z. Deng,Y. T. Ma,&F. Gao.(2011).Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet.Surface & Coatings Technology,206(6),1203-1210.
MLA	Y. Wang,et al."Improving adhesion of electroless Ni-P coating on sintered NdFeB magnet".Surface & Coatings Technology 206.6(2011):1203-1210.