Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Watanabe, Masashi; Yokoyama, Keisuke; Imai, Yoshiyuki; Ueta, Shohei; Yan, X.
Ceramics International, 48(6), p.8706 - 8708, 2022/03
Times Cited Count：8 Percentile：72.1(Materials Science, Ceramics)Previous studies have used various methods for sintering of SiC, carbon, and SiC/carbon functionally graded materials (FGM). However, no experimental studies on SiC/graphite FGM manufacturing using the spark plasma sintering (SPS) method have been reported. In this study, a SiC/graphite FGM specimen has been fabricated using SPS. The interface between the adjacent layers of the sintered specimen exhibits no apparent defects such as gaps or delaminations. The SiC and graphite phases in the specimen show no substantial change before and after sintering.
Naoe, Takashi*; Futakawa, Masatoshi; Naito, Akira*; Ioka, Ikuo; Kogawa, Hiroyuki
Jikken Rikigaku, 5(1), p.15 - 21, 2005/03
no abstracts in English
Ono, Masao; Kinoshita, Takahiro*; Ueno, Hideto*; Huang, X.*; Osakabe, Toyotaka; Mashimo, Tsutomu
Materials Transactions, 46(2), p.219 - 224, 2005/02
Times Cited Count：8 Percentile：54.84(Materials Science, Multidisciplinary)Ultracentrifuge experiments were performed on the In-Pb system to study the sedimentation of atoms and phase equilibrium. After the experiments, the graded structures were obtained. Pb-rich phase (f.c.c) and In-rich phase (tetragonal) appeared at the strong- and weak-gravitational field sides of the sample, respectively, from starting state of 
-phase. And, the continuous changes in lattice parameters were observed in each phase. These observation results showed that the graded structure was continuous in atomic scale, and was formed by the sedimentation of atoms. Composition profiles of the centrifuged samples for 31.3 h, 60 h and 150 h showed that the composition change reached the steady state within 60 hours. The diffusion coefficient for sedimentation was estimated to be about 8 times larger than that for usual diffusion by the simulation. The result indicated that the diffusion mechanism of the sedimentation was different from the conventional ones.
Huang, X.*; Mashimo, Tsutomu; Ono, Masao; Tomita, Takeshi; Sawai, Tomotsugu; Osakabe, Toyotaka; Mori, Nobuo*
Journal of Applied Physics, 96(3), p.1336 - 1340, 2004/08
Times Cited Count：11 Percentile：42.73(Physics, Applied)Mega-gravity field experiments were performed on the Bi
Sb
(atomic percent) alloy and pure Bi below their melting points, to investigate the change in crystalline state. For the alloy centrifuged at 191-205 
C, no change in composition was observed, and the grain sizes of the crystals decreased from several mm to tens of 
m, while no distinct change in grain size was observed for the centrifuged pure Bi. The alloy centrifuged at 220-240 C consisted of two regions with different morphologies-fine-grained crystals with grain sizes around tens of m in the low gravity region, and large crystals with grain sizes several mm long and hundreds of m wide along the direction of gravity in the high gravity region, where sedimentation of atoms was confirmed. The large crystals with hexagonal structures were formed by preferential crystal growth roughly along the c axes, and a large strain that increased as the gravitational field increased existed inside these crystals. Formation of this anomalous crystal state might be correlated with the sedimentation of atoms.
Ishida, Toshihisa; Yoritsune, Tsutomu
Nuclear Engineering and Design, 215(1-2), p.51 - 67, 2002/06
Times Cited Count：112 Percentile：98.39(Nuclear Science & Technology)no abstracts in English
Inoue, Kazuko*; Nakamura, Hiroshi*; Horikawa, Takeshi*; Kawashima, Hisakazu*; Tsujikami, Tetsuya*; Minakawa, Nobuaki
Nihon Zairyo Gakkai Dai-50-Ki Gakujutsu Koenkai Koen Rombunshu, p.415 - 416, 2001/05
no abstracts in English
Makuuchi, Keizo
Porima Daijesuto, 51(2), p.30 - 47, 1999/02
no abstracts in English
Tamai, Hiroshi; Takenaga, Hidenobu; Asakura, Nobuyuki; Higashijima, Satoru; Hosogane, Nobuyuki; Itami, Kiyoshi; Konoshima, Shigeru; Kubo, Hirotaka; Sakasai, Akira; Sakurai, Shinji; et al.
Journal of Nuclear Materials, 266-269, p.1219 - 1223, 1999/00
Times Cited Count：8 Percentile：53.55(Materials Science, Multidisciplinary)no abstracts in English
; Hirakawa, Yasushi; Kano, Shigeki; Yoshida, Eiichi
PNC TN9410 98-048, 56 Pages, 1998/03
Planar specimens of functionally gradient material (FGM) for thermal stress relaxation in fast reactor environment were formed and evaluated. FGMs of Al
O
-SUS316L system and YO-SUS316L system were deposited on SUS316L substrates by low pressure plasma spraying. The deposited coatings with 6 layers in which the ratio of ceramics/SUS316FR changes from 0 to 100% by 20% were successfully formed. Cross-sectional observation of the coatings showed no cracks and the hardness in the coating increased continuously from the substrate to the surface. From the results of X-ray diffraction, there were no changes in the structure of SUS316L and YO between the powder and the coating. On the contrary, in the case of AlO, 
- AlO phase was detected in the coating formed from 
_
_
$ powder. The specimens were exposed in liquid sodium at 823K or 923K for 3.6Ms(1000h). The coatings were damaged with many cracks in liquid sodium. It was revealed that the bonding strength between the sprayed particles were not sufficient. To improve the stability in liquid sodium, another specimens were formed with changing the chamber pressure during deposition. From the microstructural inspections of the specimens, the coating formed at higher chamber pressure showed less porosity.
Yamane, Yuichi; Miyoshi, Yoshinori; *
JAERI-Tech 97-039, 16 Pages, 1997/08
no abstracts in English
Saito, Kazunari; Yoshikawa, Masahito; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; Takahashi, Yoshihiro*; Onishi, Kazunori*
JAERI-Conf 97-003, p.243 - 248, 1997/03
no abstracts in English
Futakawa, Masatoshi; Onuki, Kaoru; Ioka, Ikuo; Nakajima, Hayato; Shimizu, Saburo; Kuriki, Yoshiro*; Nagoshi, Masayasu*
Zairyo To Kankyo, 46(10), p.669 - 674, 1997/00
no abstracts in English
Yoshikawa, Masahito; *; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; Yoshida, Sadafumi*; Okumura, Hajime*; Takahashi, Yoshihiro*; Onishi, Kazunori*
Journal of Applied Physics, 80(1), p.282 - 287, 1996/07
Times Cited Count：22 Percentile：70.66(Physics, Applied)no abstracts in English
Yamane, Yuichi; ; *
JAERI-Tech 96-018, 14 Pages, 1996/05
no abstracts in English
Yoshikawa, Masahito; *; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; Okumura, Hajime*; Yoshida, Sadafumi*
14th Symp. on Materials Science and Engineering, Research Center of Ion Beam Technology, Hosei Univ., 0, p.159 - 165, 1996/00
no abstracts in English
Nakano, Junichi; Fujii, Kimio; Yamada, Reiji
Functionally Graded Materials 1996, 0, p.439 - 444, 1996/00
no abstracts in English
