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Journal Articles

Hydrogen behavior in primary precipitate of F82H steel; Atomistic calculation based on the density functional theory

Watanabe, Yoshiyuki; Iwakiri, Hirotomo*; Murayoshi, Norihiko*; Kato, Daiji*; Tanigawa, Hiroyasu

Plasma and Fusion Research (Internet), 10, p.1205086_1 - 1205086_2, 2015/12

In this paper, formation energy of isolated hydrogen atom in Cr$$_{23}$$C$$_{6}$$ has been theoretically investigated with atomistic calculation based on the density functional theory. The lowest calculated formation energy of a hydrogen atom is -0.48 eV with a trigonal bipyramidal configuration surrounded by five regular Cr lattice atoms. A comparison of the formation energy of hydrogen atom in bcc-iron may indicate that hydrogen atoms in F82H steel are more energetically favorable in Cr$$_{23}$$C$$_{6}$$-based precipitate rather than Fe-based matrix, leading to an increase of the tritium retention in the precipitate.

Journal Articles

Development of beryllides as advanced neutron multipliers for fusion blankets

Tsuchiya, Kunihiko; Kawamura, Hiroshi; Mishima, Yoshinao*; Yoshida, Naoaki*; Tanaka, Satoru*; Uchida, Munenori*; Ishida, Kiyohito*; Shibayama, Tamaki*; Munakata, Kenzo*; Sato, Yoshiyuki*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 83(3), p.207 - 214, 2007/03

no abstracts in English

Journal Articles

Deuterium retention properties of Be$$_{12}$$Ti

Iwakiri, Hirotomo*; Yoshida, Naoaki*; Uchida, Munenori*; Kawamura, Hiroshi

JAERI-Conf 2004-006, p.220 - 224, 2004/03

no abstracts in English

Journal Articles

Thermal desorption of deuterium from ion irradiated Be$$_{12}$$Ti

Iwakiri, Hirotomo*; Yasunaga, Kazufumi*; Yoshida, Naoaki*; Uchida, Munenori*; Kawamura, Hiroshi

Journal of Nuclear Materials, 329-333(Part A), p.880 - 884, 2004/00

 Times Cited Count:7 Percentile:46.83(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Radiation damage on metals by high energy helium irradiation, 2

Katakabe, Yoichi*; Sugano, Ryuichiro*; Iwakiri, Hirotomo*; Hamaguchi, Dai; Iwai, Takeo*; Yoshida, Naoaki*

no journal, , 

no abstracts in English

Oral presentation

Radiation damage by high energy helium, 2

Katakabe, Yoichi*; Sugano, Ryuichiro*; Iwakiri, Hirotomo*; Hamaguchi, Dai; Iwai, Takeo*; Yoshida, Naoaki*

no journal, , 

no abstracts in English

Oral presentation

Hydrogen behavior in primary precipitate in RAFM steel; Theoretical approach with the first principle calculation

Watanabe, Yoshiyuki; Iwakiri, Hirotomo*; Murayoshi, Norihiko*; Kato, Daiji*; Tanigawa, Hiroyasu

no journal, , 

no abstracts in English

Oral presentation

Synthesis of beryllium inter-metallic compounds as a hydrogen storage material

Kim, Jae-Hwan; Iwakiri, Hirotomo*; Nakamichi, Masaru

no journal, , 

no abstracts in English

Oral presentation

Development of synthesis technology on beryllium intermetallic compounds as light hydrogen storage alloys

Kim, Jae-Hwan; Iwakiri, Hirotomo*; Nakamichi, Masaru

no journal, , 

no abstracts in English

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