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Motohashi, Yoshinobu*; Shibata, Taiju; Harjo, S.*; Sakuma, Takaaki*; Ishihara, Masahiro; Baba, Shinichi; Sawa, Kazuhiro
Proceedings of 14th International Federation for Heat Treatment and Surface Engineering Congress Transactions of Materials and Heat Treatment Vol.25 No.5, p.1032 - 1036, 2004/10
no abstracts in English
Kikuchi, Makoto*; Motohashi, Yoshinobu*; Ito, Tsutomu*; Sakuma, Takaaki*; Shibata, Taiju; Baba, Shinichi; Ishihara, Masahiro; Sawa, Kazuhiro; Hojo, Tomohiro*; Tsuji, Nobumasa*
Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2004) Koen Rombunshu (No.040-3), p.57 - 58, 2004/09
no abstracts in English
O
joints bonded using superplastic ceramics as interlayerSato, Takashi*; Motohashi, Yoshinobu*; Sakuma, Takaaki*; Waseda, Kazuyoshi*; Shibata, Taiju; Ishihara, Masahiro; Sawa, Kazuhiro
Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2004) Koen Rombunshu (No.040-3), p.55 - 56, 2004/09
no abstracts in English
Hojo, Tomohiro; Aihara, Jun; Hojo, Kiichi; Furuno, Shigemi*; Yamamoto, Hiroyuki; Nitani, Noriko; Yamashita, Toshiyuki; Minato, Kazuo; Sakuma, Takaaki*
Journal of Nuclear Materials, 319, p.81 - 86, 2003/06
Times Cited Count：20 Percentile：75.15(Materials Science, Multidisciplinary)no abstracts in English
Shibata, Taiju; Ishihara, Masahiro; Motohashi, Yoshinobu*; Baba, Shinichi; Hoshiya, Taiji; Kobayashi, Tomokazu*; Harjo, S.*; Sakuma, Takaaki*
Nuclear Instruments and Methods in Physics Research B, 206, p.139 - 143, 2003/05
Times Cited Count：4 Percentile：33.51(Instruments & Instrumentation)no abstracts in English
Motohashi, Yoshinobu*; Kobayashi, Tomokazu*; Harjo, S.*; Sakuma, Takaaki*; Shibata, Taiju; Ishihara, Masahiro; Baba, Shinichi; Hoshiya, Taiji
Nuclear Instruments and Methods in Physics Research B, 206, p.144 - 147, 2003/05
Times Cited Count：4 Percentile：33.51(Instruments & Instrumentation)The 3mol% yttria containing tetragonal zirconia polycrystals(3Y-TZP) were irradiated using 130MeV Zr
ions in the TANDEM accelerator facility at Tokai Research Establishment, JAERI. Irradiation was performed with the fluence of 3.5
10
and 2.110
ions/m
. Residual stress and changes in mechanical properties caused by the ion irradiation and the effects of the subsequent annealing are studied. The occurrence of compressive residual stresses and increases in hardness and fracture toughness were found at the surface regions of as-irradiated specimens. It was found from the subsequent annealing that these quantities decreased gradually with raising the annealing temperature and returned to that of un-irradiated state at around 1173K. A most probable cause of the increases in the hardness and fracture toughness after the irradiation may, therefore, be the residual compressive stresses left in the irradiated surface region.
Sakuma, Takaaki*; Motohashi, Yoshinobu*; Kobayashi, Tomokazu*; Harjo, S.*; Shibata, Taiju; Ishihara, Masahiro; Baba, Shinichi; Hoshiya, Taiji
Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2002) Koen Rombunshu (No.020-3), p.125 - 126, 2002/09
no abstracts in English
Shibata, Taiju; Ishihara, Masahiro; Motohashi, Yoshinobu*; Baba, Shinichi; Hoshiya, Taiji; Sakuma, Takaaki*
Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2002) Koen Rombunshu (No.020-3), p.123 - 124, 2002/09
Applications of superplastic ceramics to nuclear energy fields are very promising because of their superior mechanical and thermal properties. In this study, Zr ion irradiation effects on superplastic deformation behavior of a typical superplastic ceramic, 3mol% yttria containing tetragonal zirconia polycrystals (3Y-TZP), were studied. Zr
ions with 130MeV were irradiated on the 3Y-TZP specimens by TANDEM accelerator at fluence levels of 3.5x10 and 2.1x10ions/m. Their mechanical properties were examined by three-point bending test at elevated temperatures after the irradiation. As a result, at the temperature range from the room temperature to 1473K, any obvious irradiation effects were not found by the bending test. On the other hand, at the range from 1623K to 1773K, it was found that the superplastic deformation behavior was changed by the Zr ion irradiation. The activation energy of superplastic deformation was increased with increasing the irradiation fluence.
Wan, C.*; Kobayashi, Tomokazu*; Motohashi, Yoshinobu*; Sakuma, Takaaki*; Ishihara, Masahiro; Shibata, Taiju
Ibaraki Daigaku Kogakubu Kenkyu Shuho, 49, p.69 - 79, 2002/02
no abstracts in English
Sakuma, Takaaki*; Nakamura, Y.*; Hirota, M.*; Murakami, A.*; Ishii, Yoshinobu
Solid State Ionics, 127(3-4), p.295 - 300, 2000/01
Times Cited Count：8 Percentile：43.94(Chemistry, Physical)no abstracts in English
Kumagai, Koji*; Motohashi, Yoshinobu*; Sakuma, Takaaki*; Shibata, Taiju; Sawa, Kazuhiro
no journal, ,
no abstracts in English
Sasajima, Yukihiro*; Motohashi, Yoshinobu*; Sakuma, Takaaki*; Shibata, Taiju; Aihara, Jun; Sawa, Kazuhiro
no journal, ,
no abstracts in English
