H-sorption properties and structural evolution of Mg processed by severe plastic deformation

被引：28

作者：

Botta, W. J. ^{[1
]}

Jorge, A. M., Jr. ^{[1
]}

Veron, M. ^{[2
]}

Rauch, E. F. ^{[2
]}

Ferrie, E. ^{[2
]}

Yavari, A. R. ^{[2
]}

Huot, J. ^{[3
]}

Leiva, D. R. ^{[4
]}

机构：

[1] Univ Fed Sao Carlos, Dept Engn Mat Rod, BR-13565905 Sao Carlos, SP, Brazil

[2] INP Grenoble, Inst Natl Polytech, SIMaP CNRS, F-38402 St Martin Dheres, France

[3] Univ Quebec Trois Rivieres, Inst Rech Hydrogene, Trois Rivieres, PQ G9A 5H7, Canada

[4] Univ Estadual Campinas, Fac Ciencias Aplicadas, BR-13484350 Limeira, SP, Brazil

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 580卷

基金：

巴西圣保罗研究基金会;

关键词：

Hydrogen storage; Mg; Severe plastic deformation; Orientation microscopy; HYDROGEN STORAGE; MAGNESIUM HYDRIDE; METAL-OXIDES; KINETICS; ACTIVATION; DESORPTION; ROUTES; ALLOY;

D O I：

10.1016/j.jallcom.2013.03.013

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：

MgH2-based nanocomposites are excellent candidates for hydrogen storage applications due to their high hydrogen gravimetric capacities, reversibility of the absorption/desorption reactions and low cost of Mg. A conventional route to obtain MgH2 is high-energy ball milling which involves processing in controlled atmosphere due to the poor resistance of the nanometric powder for air contamination (O-2, H2O, etc.). In the present work we evaluated the H-sorption properties of bulk Mg samples produced by different severe plastic deformation (SPD) routes and we associated the results with their microstructural characteristics. The SPD techniques included high pressure torsion (HPT) and cold rolling (CR), applied to process commercial Mg and fine-grained Mg ribbons, which were obtained by rapid solidification. Enhanced H-sorption properties were observed for the sample processed by melt-spinning followed by cold-rolling and these properties were associated with refined microstructure and stronger (0001) texture, (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：S187 / S191

页数：5

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