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Nb在單相Nd2Fe14B納米晶合金晶化過程中的作用
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The Roles of Nb in Crystallization Procedure of Nano-Crystal Nd2Fe14B Permanent Magnet
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    摘要:

    利用X射線衍射、透射電鏡和三維原子探針(three-dimensional atom probe, 簡稱3DAP )等研究Nb在單相Nd2Fe14B納米晶永磁合金的作用機制。結(jié)果表明，Nb的添加提高了合金的非晶形成能力和非晶的熱穩(wěn)定性，使得合金最佳晶化溫度升高。三維原子探針分析表明，Nb一方面分布在非晶基體中，另一方面在淬態(tài)薄帶中存在不同程度的偏聚，這些Nb富集區(qū)中存在大量B元素，稀土含量很少，甚至不存在，含有部分Fe元素。Nb富集區(qū)的存在阻礙新生Nd2Fe14B相的長大，使晶化后的組織細小且均勻，提高了

    Abstract:

    The roles of Nb played in crystallization procedure of nano-crystal Nd2Fe14B permanent magnet were investigated by XRD, TEM and 3DAP. The results revealed that the addition of Nb improved the glass formation ability of the alloys and the thermal stability of the as-spun amorphous ribbons, as well as improving the optimum crystallization temperature. Nb atoms, together with more B atoms and some Fe atoms, had some enrichment in the as-spun ribbons, but few or no Nd atoms were found at these Nb-enriched regions. Nb-enriched phase hindered the growth of Nd2Fe14B grains, refined the microstructure and improved the magnetic properties

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隋延力,王占勇,包小倩,張茂才,周壽增. Nb在單相Nd2Fe14B納米晶合金晶化過程中的作用[J].稀有金屬材料與工程,2009,38(7):1164~1168.[Sui Yanli, Wang Zhanyong, Bao Xiaoqian, Zhang Maocai, Zhou Shouzeng. The Roles of Nb in Crystallization Procedure of Nano-Crystal Nd2Fe14B Permanent Magnet[J]. Rare Metal Materials and Engineering,2009,38(7):1164~1168.]
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  • 收稿日期:2008-06-22
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