Study of Mg-M (M = Co, Ni and Fe) mixture elaborated by reactive mechanical alloying: hydrogen sorption properties
Study of Mg-M (M = Co, Ni and Fe) mixture elaborated by reactive mechanical alloying: hydrogen sorption properties
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DOI：
10.1016/s0360-3199(00)00082-3
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发表时间：
2001-05-01
影响因子：
7.2
通讯作者：
Darriet, B
中科院分区：
文献类型：
--
作者：
Bobet, JL;Akiba, E;Darriet, B
镁粉的反应机械合金化（MA in H-2）可以将 Mg 部分转化为 MgH2。 MgH2/Mg 的比率可以通过增加研磨时间或添加 3d 元素（具有相同的初始粒度）来提高。 X 射线衍射成功地用于测定形成的 MgH2 的量。 RMA 可以抑制镁通常要求的激活程序。氢化被确定为两步过程：首先成核，然后扩散。成核持续时间和比表面之间存在直接关系。结果表明，短时间（2 h）的RMA是强烈改善镁和（Mg + 10 wt% M）混合物储氢性能的有效方法。 (C) 2001 年国际氢能协会。由爱思唯尔科学有限公司出版。保留所有权利。
Reactive Mechanical Alloying (MA in H-2) Of magnesium powder allows to obtain partial conversion of Mg to MgH2. The ratio MgH2/Mg can be improved by increasing the milling time or by adding a 3d-element (with the same initial particle size). X-ray diffraction was applied successfully to determine the quantity of MgH2 formed. The RMA allows to suppress the activation procedure generally requested for magnesium. The hydriding is determined to be a two step process: first nucleation and then diffusion. A direct relationship exists between the nucleation duration and the specific surface. It is demonstrated that RMA for short time (2 h) is an effective way to strongly improve the hydrogen storage properties of both magnesium and (Mg + 10 wt% M) mixtures. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.