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Abe, Hiroshi; Aone, Shigeo*; Morimoto, Ryo*; Uchida, Hirohisa*
Journal of Alloys and Compounds, 580(Suppl.1), p.S219 - S221, 2013/12
Times Cited Count：5 Percentile：31.8(Chemistry, Physical)no abstracts in English
Abe, Hiroshi; Orimo, Satoshi; Kishimoto, Masahiko*; Aone, Shigeo*; Uchida, Hirohisa*; Daido, Hiroyuki; Oshima, Takeshi
Nuclear Instruments and Methods in Physics Research B, 307, p.218 - 220, 2013/07
Times Cited Count：1 Percentile：11.54(Instruments & Instrumentation)We investigated the structure changes of a hydrogen storage alloy by ion irradiations, and its absorption property in order to obtain basic data and to elucidate relevant mechanisms of hydrogen absorption by the influence of the irradiation. In previous studies, the induction of vacancies in a hydrogen absorption alloy was found to be effective to increase in the hydrogen absorption rate. As well known, the rate of hydrogen absorption strongly depends upon the surface state of a hydrogen storage alloy because the dissociation of hydrogen molecules or water molecules needs electron change with the surface in the H
gas or electrochemical reaction process. In this study, ion irradiations were made at a room temperature using the laser driven proton beam method, at Kansai Photon Science Institute, Japan Atomic Energy Agency. The beam treatment has several unique properties such as short pulse duration, high peak current, low transverse emittance, and wide energy range from KeV to MeV. The irradiation was used to modify the alloy surface using this equipment. From obtained results, the initial hydrogen absorption rate was found improved by the laser driven proton beam rather more effectively than a mono-energetic proton beam. Discussion is made on the correlation among proton irradiation (laser driven proton or mono-energetic proton) and the initial hydrogen absorption rate of the alloy. We argue about the usefulness of an energy spread beam.
Abe, Hiroshi; Aone, Shigeo*; Morimoto, Ryo*; Uchida, Hirohisa*; Oshima, Takeshi
Transactions of the Materials Research Society of Japan, 36(1), p.133 - 135, 2011/03
The introduction of vacancies in Pd was found to be effective for an increase in the initial hydrogen absorption rate in a previous study. Also, it was reported that the initial hydrogen absorption rate depends strongly on the surface conditions of metals. Heavy ions with keV ranges can create severe damage and high densities of vacancy near the surface of materials. As well known, the formation of hydride phases can be facilitated by the presence of vacancy because vacancy acts as hydrogen trapping site to form hydrides. Thus, the hydrogen absorption characteristics of Pd may be improved by the irradiation of heavy ions. As a result, the initial hydrogen absorption rate increased due to ion irradiation, and the value became 3
10 times higher than un-irradiated Pd.
Abe, Hiroshi; Aone, Shigeo*; Uchida, Hirohisa*; Oshima, Takeshi
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 145, 2008/11
no abstracts in English
Aone, Shigeo*; Morimoto, Ryo*; Abe, Hiroshi; Uchida, Hirohisa*
no journal, ,
no abstracts in English
Abe, Hiroshi; Morimoto, Ryo*; Aone, Shigeo*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
no abstracts in English
Abe, Hiroshi; Morimoto, Ryo*; Aone, Shigeo*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
no abstracts in English
Aone, Shigeo*; Abe, Hiroshi; Uchida, Hirohisa*
no journal, ,
no abstracts in English
(Al, Mn, Co)
alloyAone, Shigeo*; Uchida, Hirohisa*; Abe, Hiroshi
no journal, ,
The effects of ion irradiation and a KOH pretreatment on the rate of electrochemical hydrogen absorption by the MmNi(Al, Mn, Co)
alloy were investigated. The ion irradiation method is known to produce a high density of vacancy type defects in metals. In previous studies, we reported the remarkable enhancement of the initial rate of hydrogen absorption by the LaNi
with pretreatments of alkaline hydroxide solutions such as KOH. In addition, we revealed that the hydriding properties of the alloy and Pd can be improved by ion irradiations at TIARA (Takasaki Ion Accelerators for Advanced Radiation Application), JAEA. In this study, we examined the effects of surface modifications by the alkaline treatment and ion irradiations. The both pretreatments are found effective to improve kinetics of hydrogen absorption by the alloy.
Abe, Hiroshi; Morimoto, Ryo*; Aone, Shigeo*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
In previous studies, the induction of vacancy in palladium (Pd) was found to be effective for an increase in the initial hydrogen absorption rate. As well known, the initial hydrogen absorption rate depends strongly on the surface conditions of metals. Based on these results, we made surface modifications of Pd using various ions at TIARA, JAEA. In this study, we perform Cr ion irradiation into Pd, and the hydrogen absorption rate of ion irradiation Pd was evaluated. The Pd irradiated at a fluence to 1
10
cm
exhibited the highest rate in all samples, and the hydrogen absorption rate became five times higher than that of un-irradiated Pd. Since vacancy type defects which might act as hydrogen trapping site are introduced by irradiation the enhancement of the hydrogen absorption rate obtained inthi study can be interpreted in terms of an increase of hydrogen trapping saites near the surface region due to irradiation of Cr ion into Pd.
Abe, Hiroshi; Aone, Shigeo*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
no abstracts in English
Abe, Hiroshi; Orimo, Satoshi; Kishimoto, Masahiko*; Aone, Shigeo*; Uchida, Hirohisa*; Daido, Hiroyuki; Oshima, Takeshi
no journal, ,
no abstracts in English
Ce)Ni
(Al, Mn, Co)
hydrogen storage alloysAbe, Hiroshi; Yoneda, Yasuhiro; Aone, Shigeo*; Uchida, Hirohisa*
no journal, ,
no abstracts in English
Orimo, Satoshi; Abe, Hiroshi; Daido, Hiroyuki; Nishiuchi, Mamiko; Kishimoto, Masahiko*; Aone, Shigeo*; Uchida, Hirohisa*; Ogura, Koichi; Pirozhkov, A. S.; Suguyama, Hironori*; et al.
no journal, ,
The fuel cell was researched in the Kansai Photon Science Institute, JAEA. It has aimed at the surface modification of a metallic material. The laser driven proton beam is a spectrum of 10 kev-MeV that the pulse duration is about ns. The irradiation did -10-100 shot by 1Hz J-KAREN laser system.
Abe, Hiroshi; Aone, Shigeo*; Kishimoto, Masahiko*; Muraki, Keita*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
no abstracts in English
, Bi) irradiation and alkaline treatment on the electrochemical hydrogen absorption rateNakajima, Hiroto*; Aone, Shigeo*; Abe, Hiroshi; Uchida, Hirohisa*
no journal, ,
no abstracts in English
Abe, Hiroshi; Aone, Shigeo*; Morimoto, Ryo*; Uchida, Hirohisa*; Oshima, Takeshi
no journal, ,
no abstracts in English
