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Titolo:
Effect of Fe addition on hydrogen storage characteristics of Ti0.16Zr0.05Cr0.22V0.57 alloy
Autore:
Cho, SW; Enoki, H; Akiba, E;
Indirizzi:
Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan Natl Inst Mat & Chem Res Tsukuba Ibaraki Japan 3058565 aki 3058565, Japan Japan Steel Works Ltd, Tokyo 1838503, Japan Japan Steel Works Ltd Tokyo Japan 1838503 orks Ltd, Tokyo 1838503, Japan
Titolo Testata:
JOURNAL OF ALLOYS AND COMPOUNDS
, volume: 307, anno: 2000,
pagine: 304 - 310
SICI:
0925-8388(20000714)307:<304:EOFAOH>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
CR-V ALLOYS; ABSORPTION;
Keywords:
hydrogen storage materials; energy storage materials; transition metal compounds; gas solid reaction; interstitial alloys;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Akiba, E Natl Inst Mat & Chem Res, 1-1 Higashi, Tsukuba, Ibaraki 3058565, Japan Natl Inst Mat & Chem Res 1-1 Higashi Tsukuba Ibaraki Japan 3058565
Citazione:
S.W. Cho et al., "Effect of Fe addition on hydrogen storage characteristics of Ti0.16Zr0.05Cr0.22V0.57 alloy", J ALLOY COM, 307, 2000, pp. 304-310

Abstract

The effect of Fe addition on hydrogen storage characteristics of Ti0.16Zr0.05Cr0.22V0.57 alloy has been studied at 303 K. The X-ray diffraction (XRD)patterns of the alloy powders showed the typical patterns of BCC structureas a main phase in all of the alloys. With increasing Fe content, the lattice parameters of the BCC phases decreased linearly in accordance with Vegard's law. With regard to the maximum hydrogen storage capacities of the alloys, there was a noticeable decrease between alloys that contained 3 and 5 at% of Fe. The reason for this can be deduced from three factors: the decrease in the lattice parameter of BCC phase, the decrease of the amount of BCC phase itself in the alloy, and the excess of the electron-to-atom ratio over 5.1 (5.09 at 3 at% Fe and 5.16 at 5 at% Fe) with increasing Fe content. The Fe addition remarkably increased the second plateau pressures in the pressure composition (P-C) isotherms. I-Iowever, the first plateau was not observed in all the alloys under the conditions of the present study. From the relation between the hydrogen storage capacities and the lattice parameters of the alloys, it was found that controlling the lattice parameter similarly to that of V (3.03 Angstrom), i.e. within the range of about 3.02-3.04 Angstrom, is of fundamental importance to obtain the largest effective hydrogen storage capacity in this alloy systems under the present conditions. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 06:04:49