Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Kiyoto Fukuoka"'
Autor:
K. Yamagata, Kiyoto Fukuoka, Mineo Itoh, M. Kikuchi, Masashi Kawasaki, Y. Maeji, Hiroyuki Fujita, Hiroshi Kezuka, Toshiyuki Atou
Publikováno v:
Journal of Physics: Conference Series. 43:1389-1392
A magnetic sensor, constructed of bulk Bi-Pb-Sr-Ca-Cu-O (BPSCCO), was fabricated by use of the shock compaction method, employing a propellant gun-system, and then sintered under through use of an electronic furnace. The specimen as a magnetic sensor
Publikováno v:
International Journal of Impact Engineering. 32:643-649
Titanium diboride (TiB2) has excellent mechanical properties, and is expected to be used as crashworthy material. In this study, the Hugoniot-measurements were performed on the TiB2 polycrystal by means of the inclined-mirror method combined with the
Autor:
S. Itou, T. Nojima, Eriko Ohshima, K. Watanabe, Toshiyuki Atou, Michio Kikuchi, Y. Syono, K. Tsukagoshi, H. Faqir, Kiyoto Fukuoka
Publikováno v:
Journal de Physique IV (Proceedings). 123:145-149
The platelet bulk specimen Bi 2 Sr 2 CaCu 2 Oy sandwiched between Ag disks was shocked to 5 GPa using shock loading method. The shocked specimen showed high orientation to c-axis and consolidation of high density of 95 %. Ag particles of about 10 nm
Autor:
Masae Kikuchi, Shin'ichi Katayama, Keiji Shimoda, Yasuhiko Syono, Mikio Koyano, Kiyoto Fukuoka, Masayuki Okuno
Publikováno v:
Physics and Chemistry of Minerals. 31:532-542
Shock-recovery experiments for obsidian and its fused glass have been carried out with pressure up to 35 GPa. Structural evolution accompanying the shock compression was investigated using X-ray diffraction technique, Raman and infrared spectroscopy.
Autor:
Hidenori Matsuzawa, Masashi Kawasaki, Wataru Ohashi, Masae Kikuchi, Etsuji Kakimoto, Toshiyuki Atou, Yoshihiko Takano, Kiyoto Fukuoka, Kiyotaka Dohke, Hideyuki Tamaki
Publikováno v:
Physica C: Superconductivity. :619-622
Commercially available MgB 2 powders were consolidated into bulk samples by two different shock wave consolidation methods: underwater shock consolidation method and gun method. Resistance vs. temperature of the samples was measured by the four-termi
Autor:
Hideyuki Tamaki, Kiyotaka Dohke, Masashi Kawasaki, Kiyoto Fukuoka, Wataru Ohashi, Masae Kikuchi, Etsuji Kakimoto, Toshiyuki Atou, Hidenori Matsuzawa, Hiroshi Kitazawa, Yoshihiko Takano
Publikováno v:
Superconductor Science and Technology. 17:799-803
We consolidated commercial MgB2 powders by two different shock consolidation methods: the single-stage propellant gun method and the underwater shock consolidation method. The samples prepared had anisotropic resistance–temperature features; the na
Publikováno v:
Physics and Chemistry of Minerals. 29:233-239
The densification and structural changes in SiO2 glass compressed up to 43.4 GPa by shock experiments are investigated quantitatively by the X-ray diffraction technique. Direct structural data (average Si–O and Si–Si distances and Si–O–Si ang
Autor:
H. Faqir, Kiichi Okuda, Shuichi Kawamata, Yasuhiko Syono, Masae Kikuchi, Y. Muraoka, Kiyoto Fukuoka
Publikováno v:
Superconductor Science and Technology. 13:1151-1154
Shock compaction experiments were carried out for Bi2223 to prepare a dense, oriented bulk specimen. The shocked specimen exhibited a high degree of crystallographic orientation and a high density, above 96%. The optimal condition of the crystallogra
Publikováno v:
Geophysical Research Letters. 27:2021-2024
A discontinuous volume change was observed on the Hugoniot curve of corundum (α-Al2O3) along the axis by the inclined-mirror streak photographic technique, probably due to a high-pressure phase transformation. The transition pressure was measured to
Autor:
Akira Nakamura, Takamichi Kobayashi, Eiichi Takasawa, Toshimori Sekine, Yasuhiko Syono, Masakazu Uchino, Kiyoto Fukuoka, Yuichi Noguchi, Hideaki Hikosaka, Tsutomu Mashimo
Publikováno v:
Journal of Applied Physics. 86:6710-6716
Inclined-mirror Hugoniot measurements were performed on pure AlN polycrystals in the pressure range up to 150 GPa to study the yield properties, phase transition, and equation of state. The Hugoniot-elastic limit (HEL) stress was approximately 9.4 GP