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Titolo:
Degradation of hydrogen absorbing capacity in cyclically hydrogenated TiMn2
Autore:
Semboshi, S; Masahashi, N; Hanada, S;
Indirizzi:
Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 Ku, Sendai, Miyagi 9808577, Japan
Titolo Testata:
ACTA MATERIALIA
fascicolo: 5, volume: 49, anno: 2001,
pagine: 927 - 935
SICI:
1359-6454(20010314)49:5<927:DOHACI>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAVES PHASE ALLOYS; STORAGE ALLOYS; HYDRIDE; DECREPITATION; ABSORPTION; PULVERIZATION; ELECTRODES; BATTERIES; MAGNETS; MG;
Keywords:
titanium alloys; hydride; microstructure; X-ray diffraction (XRD); transmission electron microscopy (TEM);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Semboshi, S Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan Tohoku Univ 2-1-1 Katahira Sendai Miyagi Japan 9808577 , Japan
Citazione:
S. Semboshi et al., "Degradation of hydrogen absorbing capacity in cyclically hydrogenated TiMn2", ACT MATER, 49(5), 2001, pp. 927-935

Abstract

Degradation of the hydrogen absorbing capacity in cyclically hydrogenated TiMn2 (Ti-60 at.% Mn) with Laves structure was studied by measurement of pressure-composition-isotherm (PCT) curves. Xray diffraction and microstructure observation. Characteristic changes with cyclic hydrogenation are observed as follows. The hydrogen absorbing capacity remarkably decreases, the lattice constant increases, the amount of hydrogen retained in TiMn2 increases and it approaches almost zero by dehydrogenation at 673 K in vacuum. Nano-sized regions with Moire patterns are produced in TiMn2 with hydrogenationand Debye rings corresponding to titanium hydride delta -TiH appear in thediffraction pattern. Based on these observations it is concluded that the degradation of hydrogen absorbing capacity after cyclic hydrogenation is attributable to the introduction of retained hydrogen, heterogeneous strain and/or nano-sized regions. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 20/09/20 alle ore 06:15:45