Highly improved hydrogen storage dynamics of nanocrystalline and amorphous NdMg12-type alloys by mechanical milling
作者机构：China National Institute of StandardizationBeijing 100191China Department of Functional Material Research.Central Iron and Steel Research InstituteBeijing 100081China Weishan Cisri Rare Earth Materials Co.Ltd.Jining 277600ShandongChina
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2020年第27卷第10期
页 面：1236-1246页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：It is sincere thanks to the National Natural Science Foundation of China(Nos.51871125 and 51761032) the MajorScience and Technology Innovation Projects in Shandong Province(2019JZZYO10320)for the financial support of this work
主 题：NdMg12 alloy Hydrogen storage dynamics Activation energy Mechanical milling Ni addition
摘 要：To improve the hydrogenation and dehydrogenation dynamics of NdMg12-type alloy,we replaced part of Mg with Ni in thesamples and used the ball milling method to prepare NdMg11Ni+x wt.%Ni(x=100,200)*** infuences of millingduration and Ni content on the electrochemical and gascous dynamics of the samples were studied in ***-tion activation cnergies of samples were calculated by using Kissinger and Arrhenius *** conclusions show thatthe dynamic properties of samples are significantly enhanced with the increase in Ni *** the change of the miling duration,the gaseous hydrogenation rate and high rate discharging capability reach the maximal ***,thedehydrogenation dynamics of sample alloys are always enhanced with the prolonging of milling *** concretely,prolonging milling duration from 5 to 60 h improves the dehydrogenation ratio of NdMgNi+100 wt.%Ni alloy from58.03%to 64.81%and that of NdMgNi+200 wt.%Ni alloy from 62.20%to 71.59%.Besides,the enhancement of gaseoushydrogen storage dynamics of the samples is believed to be the result of the declined dehydrogenation activation energyresulted from the increase in milling duration and Ni content.
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