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釹含量對Mg-Cu-Nd非晶合金貯氫性能的影響
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TF123.7

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Supported by the Doctoral Foundation of Xi'an Jiaotong University (DFXJTU-200516) and National Natural Science Foundation of China (50371066)


Effects of Neodymium Content on Hydrogen- Storage Properties of Mg-Cu-Nd Amorphous Alloys
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    摘要:

    通過溶體快淬成功制備了(Mg65Cu25)100-xNdx(x=2,5,7,10)非晶/納米晶貯氫合金,利用透射電鏡、x射線衍射儀和差熱分析儀研究了合金的微觀組織結(jié)構(gòu)及其熱性能,采用ARBINBTW-2000型電池測試儀研究了合金的貯氫性能。結(jié)果表明:隨著釹含量的增高,合金的貯氫量呈現(xiàn)上升趨勢。非晶(Mg65Cu25)93Nd7合金具有最好的貯氫動力學(xué)性能和貯氫容量,最高貯氫量達(dá)到3.O%(質(zhì)量分?jǐn)?shù)),而納米晶(Mg65Cu25)98Nd2具有最低的貯氫動力學(xué)性能和貯氫容量。研究還表明,隨著釹含量的增高,合金的非晶形成能力增強(qiáng),非晶的這種獨(dú)特的短程有序結(jié)構(gòu)是提高貯氫性能的主要因素。

    Abstract:

    Amorphous and nanocrystalline Mg-based alloys (Mg65Cu25)100-xNdx (x=2,5,7,10) were prepared by melt-spinning. The microstructure of the as-quenched ribbons was characterized and the hydriding properties of these alloys were measured. The experiment results show that the as-quenched amorphous (Mg65Cu25)93Nd7 alloy display the best hydriding properties (hydriding kinetics and hydrogen absorption capacity),its maximum hydrogen capacity is 3.0 wt%H. The nanocrystalline (Mg65Cu25)98Nd2 alloy shows slower hydriding kinetics and lower hydrogen absorption capacity compared to the other Mg-Cu-Nd amorphous alloys. It is conformed that the glass-forming ability becomes strong with the increase of neodymium for the as-quenched (Mg65Cu25)100-xNdx alloys,which leads to the high H-capacity.

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黃林軍 梁工英 孫占波.釹含量對Mg-Cu-Nd非晶合金貯氫性能的影響[J].稀有金屬材料與工程,2007,36(6):1033~1036.[Huang Linjun, Liang Gongying, Sun Zhanbo. Effects of Neodymium Content on Hydrogen- Storage Properties of Mg-Cu-Nd Amorphous Alloys[J]. Rare Metal Materials and Engineering,2007,36(6):1033~1036.]
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  • 最后修改日期:2006-05-11
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