Hydrogen storage properties for Mg-Zn-Y quasicrystal and ternary alloys

被引：21

作者：

Luo, Xuanli ^{[1
]}

Grant, David M. ^{[1
]}

Walker, Gavin S. ^{[1
]}

机构：

[1] Univ Nottingham, Fac Engn, Mat Mech & Struct Res Div, Nottingham NG7 2RD, England

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 645卷

基金：

英国工程与自然科学研究理事会;

关键词：

Hydrogen storage; Quasicrystal; Zinc-magnesium-yttrium alloy; PHASE; ABSORPTION;

D O I：

10.1016/j.jallcom.2015.01.266

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three Zn-Mg-Y alloys with nominal compositions of Zn50Mg42Y8 and Zn60Mg30Y10 were prepared by induction melting or gas atomisation. XRD and SEM analysis shows samples ZMY-1 and ZMY-2 consisted of multiple phases including icosahedral quasicrystal (QC) i-phase, hexagonal H-phase and Mg7Zn3, whilst ZMY-3 contained QC only. The hydrogen storage properties of the Zn-Mg-Y quasicrystal and ternary alloys were investigated for the first time. The quasicrystal sample ZMY-3 hydrogenated at 300 degrees C had 0.3 wt.% capacity and the DSC decomposition peak temperature was 503 degrees C. Amongst the three samples, the highest hydrogen storage capacity (0.9 wt.%) and the lowest decomposition peak temperature (445 degrees C) was achieved by sample ZMY-1. The pressure-composition-isotherm (PCI) curve of ZMY-1 sample showed a flat plateau gave a plateau pressure of 3.5 bar at 300 degrees C, which indicates a lower dehydrogenation enthalpy than MgH2. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：S23 / S26

页数：4

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