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Titolo:
Improvement of hydrogen storage properties of Mg-Ni alloys by rare-earth addition
Autore:
Yin, JT; Yamada, T; Yoshinari, O; Tanaka, K;
Indirizzi:
Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555,Japan Nagoya Inst Technol Nagoya Aichi Japan 4668555 agoya, Aichi 4668555,Japan
Titolo Testata:
MATERIALS TRANSACTIONS
fascicolo: 4, volume: 42, anno: 2001,
pagine: 712 - 716
SICI:
1345-9678(200104)42:4<712:IOHSPO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABSORPTION; COMPOSITE; HYDRIDES;
Keywords:
hydrogen storage material; magnesium-nickel-neodymium alloy; multiphase structure; hydriding/dehydriding kinetics; pressure-composition isotherm (PCT);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Tanaka, K Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555,Japan Nagoya Inst Technol Nagoya Aichi Japan 4668555 hi 4668555,Japan
Citazione:
J.T. Yin et al., "Improvement of hydrogen storage properties of Mg-Ni alloys by rare-earth addition", MATER TRANS, 42(4), 2001, pp. 712-716

Abstract

A simple and efficient method has been employed to prepare a Mg-rich Mg-Ni-Nd alloy which exhibits a substantially large hydrogen storage capacity with excellent absorption/desorption kinetics at moderate temperatures. This method consists of fully melting raw materials in a sealed steel crucible filled with Ar and subsequent quenching into cold water. It overcomes the difficulties in the melting process of the materials due to large differencesin the melting points, specific weights, oxidizability and evaporativity of the raw materials at high temperatures. Initial activation processes, hydriding/dehydriding rates, and presure-composition isotherm (PCT) characteristics of the alloy have been examined and the results are compared with those of a MS-rich Mg-Ni alloy prepared with the same technique. The Mg-Ni-Nd ternary alloy can absorb similar to5.0 mass%H (H/M similar to1.6) at excellent speeds between 573 and 373 K, and can desorb it at moderate speeds between 573 and 473 K. This attractive property of the alloy can be explained by the catalytic action of Nd as well as the unrelaxed multiphase structure formed in the preparation process.

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Documento generato il 30/09/20 alle ore 09:32:46