Effect of Ball Milling Time on Microstructure and Hydrogen Storage Properties of Nd5Mg41Ni Alloy

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外文摘要：Mg-based alloys must be dehydrogenated at high pressure and temperatures,limiting their practical application.In this paper,Nd5Mg41Ni alloy was prepared by vacuum melting,and the as-cast alloy was ball milled for 5 h,10 h,15 h,and 20 h.The effect of ball milling time on the microstructure and hydrogen storage properties of the alloy was systematically studied.The alloy comprises Nd5Mg41,NdMg12,NdMg3,and Mg2Ni phases.The Nd5Mg41Ni alloy milling for 10 h can reach 95％of the saturated hydrogen absorption at 553 K by 40 s,and the alloy can desorb hydrogen only by 20 min.The dehydrogenation acti-vation energy is only 99.9 kJ/mol H2.Ball milling makes the alloy produce many nanocrystalline and amorphous structures.The nano-grain boundary provides a channel for the diffusion of hydrogen atoms,and the high energy at the grain boundary provides energy for the phase deformation nucleus.Ball milling leads to the refinement of alloy particles and shortens the diffusion distance of hydrogen atoms to the interior of alloy particles.Defects such as twins and dislocations generated by milling provide energy for the phase deformation nucleus during the hydrogen absorption and desorption.

外文关键词：

Hydrogen storage materialsMagnesium-base alloyBall millingNanocrystalKinetics

作者：

Zeming Yuan、Chenxu Liu、Xiaoming Li、Yongqi Sui、Zhonggang Han、Tingting Zhai、Dianchen Feng、Yanghuan Zhang

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作者单位：

Instrumental Analysis Center,Inner Mongolia University of Science and Technology,Baotou 014010,China

Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China

基金：

Program for the Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous RegionNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Inner Mongolia,ChinaNatural Science Foundation of Inner Mongolia,ChinaInner Mongolia University of Science and Technology Innovation Fund

项目编号：

NJYT2400651901105518711252019BS050052021MS050642019QDL-B11

出版年：

2024

DOI：

10.1007/s40195-024-01693-1

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(7)