Mechanical stresses originating from metal hydride composites during cyclic hydrogenation

被引：30

作者：

Heubner, Felix ^{[1
]}

Pohlmann, Carsten ^{[2
]}

Mauermann, Sebastian ^{[2
]}

Kieback, Bernd ^{[1
,2
]}

Roentzsch, Lars ^{[2
]}

机构：

[1] Tech Univ Dresden, Inst Mat Sci, D-01069 Dresden, Germany

[2] Fraunhofer Inst Mfg Technol & Adv Mat IFAM, Branch Lab Dresden, D-01277 Dresden, Germany

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 32期

关键词：

Metal hydride composites; AB(2)-type Ti-Mn alloy (Hydralloy (R)); Stress evolution; Pressure-stress-isotherms; Hydride tank design; GRAPHITE-COMPOSITES; THIN-WALL; STORAGE; HEAT; LA0.6Y0.4NI4.8MN0.2; EXPANSION; SYSTEMS; STRAIN;

D O I：

10.1016/j.ijhydene.2015.06.053

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：

Metal hydride composites (MHC), which consist of a primary hydrogen absorbing phase and secondary phases such as graphite, offer very high volumetric storage densities and operation dynamics compared to widely used metal hydride powder beds. Here, we report on the stress evolution of confined MHC during hydrogen ab- and desorption which is due to the lattice expansion of the hydrogen absorbing phase during hydrogen uptake. The stress development during hydrogenation was recorded in situ using a specially designed measuring cell. Influences of gas pressure, temperature and MHC geometry on the stress evolution were considered. In this regard, so-called pressure-stress-isotherms are proposed for the first time in thermomechanical analogy to pressure-composition-isotherms. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：10123 / 10130

页数：8

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