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The reaction of hydrogen with Mg-Cd alloys prepared by mechanical alloying

机译:氢与机械合金化制备的Mg-Cd合金的反应

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In this paper, we present the hydrogen storage properties of Mg-Cd alloys prepared by ball milling. Mechanical alloying of a mixture of Mg and Cd elemental powders containing up to 20 at.% Cd leads to a magnesium solid solution. The lattice spacings of the hcp Mg phase shrink with dissolution of cadmium atoms in Mg. The mechanically alloyed pure Mg-Cd alloys are very difficult to activate for hydrogen absorption. However, if vanadium and graphite additives are added, a Mg( Cd)-V-C nanocomposite forms after ball milling and the activation then becomes very easy. The hydrogen absorption/desorption kinetics are very fast. The plateau pressure and slope of hydrogen absorption/desorption increase, while the hydrogen storage capacity decreases with increasing cadmium content. (C) 2004 Kluwer Academic Publishers. [References: 50]
机译:在本文中,我们介绍了通过球磨制备的Mg-Cd合金的储氢性能。将含高达20 at。%Cd的Mg和Cd元素粉末的混合物机械合金化会生成镁固溶体。 hcp Mg相的晶格间距随着镉原子在Mg中的溶解而缩小。机械合金化的纯Mg-Cd合金很难激活以吸收氢。但是,如果添加钒和石墨添加剂,则在球磨后会形成Mg(Cd)-V-C纳米复合材料,因此活化非常容易。氢吸收/解吸动力学非常快。平台压力和氢吸收/解吸的斜率增加,而氢存储容量随着镉含量的增加而降低。 (C)2004 Kluwer学术出版社。 [参考:50]

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