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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Investigations on the cycle stability and the structure of the MmNi3.6Co0.75Mn0.55Al0.1 hydrogen storage alloy Ⅰ. Measurements and analysis of the cycle stability and the phase structure
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Investigations on the cycle stability and the structure of the MmNi3.6Co0.75Mn0.55Al0.1 hydrogen storage alloy Ⅰ. Measurements and analysis of the cycle stability and the phase structure

机译：MmNi3.6Co0.75Mn0.55Al0.1储氢合金的循环稳定性和结构研究Ⅰ。循环稳定性和相结构的测量和分析

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electrochemical charge-discharge cyclingtests have been made on the alloys of compositionMnNi3.6Co0.75Mn0.55Al0.1 prepared with differentcasting conditions. Casting conditions had a greatinfluence on the cycle stability and the phasestructure of the alloy. The cycle stability of thealloy could be improved by quenching the melted alloyusing the melt-spinning technique compared with itscorresponding as-cast alloy of the same composition.The higher the quenching rate, the more stable thealloy. However, a quenching rate higher than 20 ms-1was disadvantageous and unnecessary because it was noteffective in further improving the cycle stability ofthe alloy and led to too large a decrease in dischargecapacity. Compared with previous results, the effectof the quenching rate on the cycle stability and thedischarge capacity can vary with alloy composition.XRD studies showed that the as-cast alloy containedsegregations whose diffraction peaks even appeared inthe XRD profiles. To obtain a high-performance alloynot only the quenching rate but also the alloycomposition should be optimized when preparing theelectrode alloys by melt-spinning.
机译：在不同铸造条件下，对组成为MnNi3.6Co0.75Mn0.55Al0.1的合金进行了电化学充放电循环试验。铸造条件对合金的循环稳定性和相结构影响很大。与相同成分的相应铸态合金相比，采用熔体纺丝技术对熔融合金进行淬火可以提高合金的循环稳定性。淬火速率越高，合金越稳定。然而，高于20ms-1的淬火速率是不利的和不必要的，因为它不能有效地进一步改善合金的循环稳定性并且导致放电容量的降低太大。与以前的结果相比，淬火速率对循环稳定性和放电容量的影响随合金成分的不同而变化。XRD研究表明，铸态合金中含有偏析，其衍射峰甚至出现在XRD轮廓中。为了获得高性能合金，在通过熔融纺丝制备电极合金时，不仅应优化淬火速率，而且还应优化合金成分。

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