Effects of mechanical alloying on the hydrogen storage properties of the Mg(76)Ti(12)Fe(12-x)Ni(x) (x = 4, 8) materials

A recent method to obtain hydrogen storage materials based on magnesium is mechanical alloying. This method offers some advantages by enhancing surface properties of material and alloying by intimately mixing the constitutive elements, at the atomic scale, in the same time with the required processi...

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Bibliographic Details
Published in:Journal of alloys and compounds 2009-11, Vol.488 (1), p.163-168
Main Authors: Lucaci, M, Biris, Al R, Orban, R L, Sbarcea, G B, Tsakiris, V
Format: Article
Language:English
Online Access:Get full text
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Summary:A recent method to obtain hydrogen storage materials based on magnesium is mechanical alloying. This method offers some advantages by enhancing surface properties of material and alloying by intimately mixing the constitutive elements, at the atomic scale, in the same time with the required processing temperature and time reducing, which lead to a low cost of delivered materials. The aim of this research is to enhance the hydrogen storage capacity of the magnesium alloys by adding some elements such as Ti, Fe and Ni, by mechanical alloying. The Mg(76)Ti(12)Fe(12-x)Ni(x) (x = 4, 8) alloys were prepared by mechanical alloying for 10, 20 and 60 h in petroleum ether medium, followed by a subsequent thermal treatment at 450 'C for 3 h, in argon atmosphere. The milling time influence on the hydrogen storage properties of the obtained materials is presented. Increasing of milling time generates single-phase materials having enhanced homogeneity. The Mg(76)Ti(12)Fe(12-x)Ni(x) (x = 4) material has a hydrogen storage capacity of 5.33 wt% hydrogen, which is totally reversible. These materials can be used for the high temperature hydrogen storage applications.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2009.07.037