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Pu
Am
O
uranium-plutonium-americium mixed oxides at 1573, 1773, and 1873 KVauchy, R.; Sunaoshi, Takeo*; Hirooka, Shun; Nakamichi, Shinya; Murakami, Tatsutoshi; Kato, Masato
Journal of Nuclear Materials, 580, p.154416_1 - 154416_11, 2023/07
Times Cited Count：4 Percentile：97.05(Materials Science, Multidisciplinary)Watanabe, Masashi; Kato, Masato
Frontiers in Nuclear Engineering (Internet), 1, p.1082324_1 - 1082324_9, 2023/01
Since the oxygen potential and the oxygen coefficient of UO
have a significant impact on fuel performance, many experimental data have been obtained. However, experimental data of the oxygen potential and the oxygen diffusion coefficient in the high temperature region above 1673 K are very limited. In the present study, we aimed to obtain these data and analyze them by defect chemistry. The oxygen potentials and the oxygen chemical diffusion coefficient of UO were measured by the gas equilibrium method in the near stoichiometric region at temperatures ranging from 1673 to 1873 K. A data set of oxygen potentials was made together with literature data and analyzed by defect chemistry. The oxygen potential of UO was determined as a function of O/U ratio and temperature, and an equation representing the relationship was derived. The oxygen chemical diffusion coefficient values obtained in this study were reasonably close to the literature values. The oxygen partial pressure dependence of the oxygen chemical diffusion coefficients was predicted from the evaluated results of the oxygen potential data, but no clear dependence was observed.
-to-
martensitic transformation of biomedical Co-Cr-Mo alloys by introducing parent phase lattice defectsMori, Manami*; Yamanaka, Kenta*; Sato, Shigeo*; Tsubaki, Shinki*; Sato, Kozue*; Kumagai, Masayoshi*; Imafuku, Muneyuki*; Shobu, Takahisa; Chiba, Akihiko*
Journal of the Mechanical Behavior of Biomedical Materials, 90, p.523 - 529, 2019/02
Times Cited Count：19 Percentile：70.43(Engineering, Biomedical)Abe, Takeyasu; Kuribayashi, Takahiro*; Nakamura, Michihiko*
European Journal of Mineralogy, 29(6), p.949 - 957, 2017/12
Times Cited Count：2 Percentile：6.18(Mineralogy)Polarised infrared spectra of synthetic single crystals and radiation-damaged natural samples were collected to examine hydroxyl incorporation in monazite. The IR spectra of pure synthetic monazite contain two OH stretching bands at 3163 and 3335 cm
with contrasting bandwidths of 40 and 90 cm, respectively. The two OH bands show strong pleochroism and dominant infrared absorption in the Y direction. The IR spectra of natural monazite contains a weak pleochroic OH band centered around 3400 cm with a bandwidth of more than 200 cm. During step-heating experiments, this broad OH band split into several bands, and these bands differ from those observed in the spectra of synthetic samples. The OH stretching signals in the spectra of both natural and synthetic samples disappeared after heating at 1000
C. Based on these results, OH defects in natural monazite arise because of secondary hydration facilitated by radiation damage, as in the case of natural zircon and xenotime.
Yamakawa, Koji*; Chimi, Yasuhiro; Ishikawa, Norito; Iwase, Akihiro*
Journal of Alloys and Compounds, 370(1-2), p.211 - 216, 2004/05
Times Cited Count：1 Percentile：12.41(Chemistry, Physical)The migration of hydrogen in Pd-1at.% Fe-H and Pd-1at.% Ag-H alloys is investigated by electrical resistivity measurement around 50 K. The disordered hydrogen atoms are introduced by electron irradiation with 0.5 MeV electrons below 15 K. The disordered atoms order by migration of hydrogen atoms during the heating-up of the specimens. The recovery curves of electrical resistivity have two sub-stages for electron irradiated specimens and one stage for fast cooled specimens. The migration energy of hydrogen is obtained from the kinetic analysis of the resistivity change due to the ordering, using the cross-cut method for the electron irradiated specimen and fast cooled specimen. The obtained value of the migration energy for the low temperature stage is smaller than that for the high temperature stage. The value for the high temperature stage is similar to the energy for the case of fast cooling. The difference between the hydrogen atoms disordered by irradiation and that by fast cooling is discussed for Pd based alloys.
Iwase, Akihiro
Materia, 41(1), p.20 - 27, 2002/01
no abstracts in English
SrCaCuO
irradiated with GeV heavy ionsKuroda, N.; Ishikawa, Norito; Chimi, Yasuhiro; Iwase, Akihiro; Ikeda, Hiroshi*; Yoshizaki, Ryozo*; Kambara, Tadashi*
Physical Review B, 63(22), p.224502_1 - 224502_5, 2001/06
Times Cited Count：9 Percentile：47.99(Materials Science, Multidisciplinary)no abstracts in English
Amaya, M.*; Une, Katsumi*; Minato, Kazuo
Journal of Nuclear Materials, 294(1-2), p.1 - 7, 2001/04
Times Cited Count：12 Percentile：64.65(Materials Science, Multidisciplinary)no abstracts in English
and (U,Gd)OMinato, Kazuo; Shiratori, Tetsuo; Serizawa, Hiroyuki; Hayashi, Kimio; Une, Katsumi*; Nogita, Kazuhiro*; Hirai, Mutsumi*; Amaya, M.*
Journal of Nuclear Materials, 288(1), p.57 - 65, 2001/01
Times Cited Count：21 Percentile：80.2(Materials Science, Multidisciplinary)no abstracts in English
Kurata, Yuji; Itabashi, Yukio; Mimura, Hideaki*; Kikuchi, Taiji; Amezawa, Hiroo; Shimakawa, Satoshi; Tsuji, Hirokazu; Shindo, Masami
Journal of Nuclear Materials, 283-287(Part.1), p.386 - 390, 2000/12
Times Cited Count：6 Percentile：42.55(Materials Science, Multidisciplinary)no abstracts in English
Inagaki, Terumi*; Ishii, Toshimitsu; *
NDT & E International, 32(5), p.247 - 257, 1999/00
no abstracts in English
SrCaCuO
tapes irradiated by ions*; *; Togano, Kazumasa*
Physical Review B, 54(22), p.16206 - 16210, 1996/12
Times Cited Count：5 Percentile：34.41(Materials Science, Multidisciplinary)no abstracts in English
A.Li*; H.Huang*; D.Li*; S.Zheng*; H.Du*; S.Zhu*; Iwata, Tadao
Japanese Journal of Applied Physics, 32(3), p.1033 - 1038, 1993/03
Times Cited Count：8 Percentile：44.66(Physics, Applied)no abstracts in English
;
Journal of Nuclear Materials, 151, p.202 - 208, 1988/00
Times Cited Count：2 Percentile：31.31(Materials Science, Multidisciplinary)no abstracts in English
;
Genshiryoku Kogyo, 33(3), p.51 - 55, 1987/03
no abstracts in English
; *
Radiation-Induced Changes in Microstructure, Part 1, p.27 - 37, 1987/00
no abstracts in English
Kazumata, Y.; *; *; *
Physica Status Solidi (B), 136, p.325 - 329, 1986/00
Times Cited Count：4 Percentile：26.95(Physics, Condensed Matter)no abstracts in English
*; ; *
Philos.Mag.Lett., 51(4), p.L49 - L53, 1985/00
no abstracts in English
; *
Radiat.Eff., 91, p.21 - 38, 1985/00
no abstracts in English
; *
Radiat.Eff.Lett., 86, p.43 - 46, 1985/00
no abstracts in English
