Hydrogen storage properties of Mg-23.5Ni-xCu prepared by rapid solidification process and crystallization heat treatment

被引：5

作者：

Hong, Seong-Hyeon ^{[2
]}

Bae, Jong-Soo ^{[2
]}

Kwon, Sung Nam ^{[3
]}

Song, Myoung Youp ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Div Adv Mat Engn, Dept Hydrogen & Fuel Cells, Engn Res Inst,Res Ctr Adv Mat Dev, Jeonju 561756, South Korea

[2] Korea Inst Machinery & Mat, Powder Mat Technol Grp, KIMS, Chang Won 641831, Gyeongnam, South Korea

[3] Chonbuk Natl Univ, Dept Hydrogen & Fuel Cells, Grad Sch, Jeonju 561756, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 03期

关键词：

Hydrogen storage; Melt spinning; Crystallization heat treatment; Mg-23.5Ni-xCu; (x=2.5; 5; and; 7.5); alloys; Hydriding and dehydriding rates; MAGNESIUM; ALLOYS; KINETICS; NICKEL; SYSTEM; NI;

D O I：

10.1016/j.ijhydene.2010.11.059

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：

A Mg-23.5wt%Ni-5wt%Cu alloy was synthesized by the gravity casting method in a large quantity (7.5 kg). From this alloy, Mg-23.5wt%Ni-xwt%Cu (x = 2.5, 5 and 7.5) samples for hydrogen storage were prepared by melt spinning and crystallization heat treatment. The samples were ground under H-2 in order to obtain a fine powder. These alloys contained crystalline Mg and Mg2Ni phases. The Mg-23.5Ni-2.5Cu alloy had the highest hydriding and dehydriding rates after activation among these alloys. The dehydriding curve under 1.0 bar H-2 at 573 K exhibits two stages; the dehydriding rate is high for about 2.5 mm (the decomposition of Mg2Ni hydride and Mg hydride in small particles), and then it becomes lower (the decomposition of Mg hydride). (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：2170 / 2176

页数：7

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