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Hydrogen-induced Amorphization in LaNi2.5M0.5 (M=Ni, Fe, Mn, Si) Alloys
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Hydrogen-induced Amorphization in LaNi2.5M0.5 (M=Ni, Fe, Mn, Si) Alloys
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    摘要:

    采用XRD和電化學(xué)測試的方法研究了Fe、Mn、Si部分替代Ni對LaNi3型貯氫合金氫致非晶化的影響。結(jié)果表明：LaNi2.5M0.5 (M = Ni，F(xiàn)e，Mn，Si)貯氫合金的主相均為LaNi3相；在第一次充電后，合金均有一定程度的氫致非晶化現(xiàn)象；LaNi3和LaNi2.5Fe0.5合金的放電曲線沒有放電平臺，表明合金充電后為非晶態(tài)；LaNi2.5Mn0.5和LaNi2.5Si0.5合金的放電曲線有一個傾斜的平臺，這表明少量的Mn和Si可以在一定程度上抑制LaNi3型貯氫合金的氫致非晶反應(yīng)。

    Abstract:

    Effects of Fe, Mn and Si on the hydrogen-induced amorphization in LaNi3 were investigated by XRD and electrochemical method. All the LaNi2.5M0.5 (M = Ni, Fe, Mn and Si) alloys were prepared by melt-spun plus annealing method and their main phase is LaNi3. It is found that the hydrogen-induced amorphization appears in all the alloys for the first charging cycle. During the discharge process, no plateau is observed in LaNi3 and LaNi2.5Fe0.5 but a plateau in LaNi2.5Mn0.5 and LaNi2.5Si0.5, indicating that a small amount of Mn and Si suppresses the tendency of hydrogen-induced amorphization.

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王 偉,陳云貴,吳朝玲. Hydrogen-induced Amorphization in LaNi2.5M0.5 (M=Ni, Fe, Mn, Si) Alloys[J].稀有金屬材料與工程,2011,40(12):2080~2082.[Wang Wei, Chen Yungui, Wu Chaoling. Hydrogen-induced Amorphization in LaNi2.5M0.5 (M=Ni, Fe, Mn, Si) Alloys[J]. Rare Metal Materials and Engineering,2011,40(12):2080~2082.]
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  • 收稿日期:2010-12-21
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