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酸洗對(duì)釹鐵硼磁體電鍍鎳層防護(hù)失效的影響
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國家支撐計(jì)劃（2009BAE71B05）；寧波科技計(jì)劃（2008B11004）


Effect of Pickling on Adhesion Failure of Ni-coating on Sintered NdFeB Substrate
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    摘要:

    研究了酸洗工藝對(duì)電鍍鎳鍍層與燒結(jié)釹鐵硼基體間結(jié)合強(qiáng)度的影響。結(jié)果表明：經(jīng)過酸洗之后，釹鐵硼基體表面層變成了疏松結(jié)構(gòu)，表面的顯微硬度降低，鎳鍍層與釹鐵硼基體結(jié)合強(qiáng)度隨酸洗時(shí)間的增加而逐漸降低。通過分析剝離層的橫截面發(fā)現(xiàn)，鍍層與基體的剝離面位于釹鐵硼基體內(nèi)部，而不是鍍層與基體的結(jié)合界面。采用垂直拉伸的剝離方法測(cè)量結(jié)合強(qiáng)度，表面和斷面形貌通過SEM進(jìn)行觀察，利用維氏硬度計(jì)測(cè)量釹鐵硼經(jīng)過酸洗后的表面維氏硬度。

    Abstract:

    In order to understand the adhesion failure between Ni-coating and sintered NdFeB substrate, the effect of pickling process on the adhesion strength of Ni-coating on NdFeB substrate was studied. The results reveal that the pickling leads to the formation of loose structure on NdFeB surface and the reduction of micro-hardness of NdFeB surface. The adhesion strength of Ni-coating on NdFeB substrate declines gradually with the increasing time of pickling. It can be found from the cross section morphology of stripped layer that the adhesion failure occurs in inner NdFeB substrate close to the surface, rather than in the interface between Ni-coating and NdFeB substrate.

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楊恒修,冒守棟,宋振綸.酸洗對(duì)釹鐵硼磁體電鍍鎳層防護(hù)失效的影響[J].稀有金屬材料與工程,2011,40(12):2241~2244.[Yang Hengxiu, Mao Shoudong, Song Zhenlun. Effect of Pickling on Adhesion Failure of Ni-coating on Sintered NdFeB Substrate[J]. Rare Metal Materials and Engineering,2011,40(12):2241~2244.]
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  • 收稿日期:2010-12-29
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