Zobrazeno 1 - 10
of 351
pro vyhledávání: '"Shinji Kohara"'
Autor:
Katsuaki Nakazawa, Kazutaka Mitsuishi, Konstantin Iakoubovskii, Shinji Kohara, Koichi Tsuchiya
Publikováno v:
NPG Asia Materials, Vol 16, Iss 1, Pp 1-7 (2024)
Abstract Dynamical and structural heterogeneities play an important role in glass transition phenomena. However, the relation between these heterogeneities is not fully revealed. In this study, we simultaneously observed these heterogeneities near th
Externí odkaz:
https://doaj.org/article/57b3027b8d9745c2a99e1262f3553c68
Publikováno v:
NPG Asia Materials, Vol 16, Iss 1, Pp 1-10 (2024)
Abstract The intermediate-range order of covalently bonded glasses has been extensively studied in terms of their diffraction peaks observed at low scattering angles; these peaks are called the first sharp diffraction peaks (FSDPs). Although the atom
Externí odkaz:
https://doaj.org/article/47913bda66b3420aaa81c6fdc390e9c5
Autor:
Yohei Onodera, Yasuyuki Takimoto, Hiroyuki Hijiya, Qing Li, Hiroo Tajiri, Toshiaki Ina, Shinji Kohara
Publikováno v:
NPG Asia Materials, Vol 16, Iss 1, Pp 1-13 (2024)
Abstract Understanding the nucleation mechanism in glass is crucial for the development of new glass-ceramic materials. Herein, we report the structure of a commercially important glass-ceramic ZrO2-doped lithium aluminosilicate system during its ini
Externí odkaz:
https://doaj.org/article/c43d29a2ac88476296d0b46d9e09a52a
Autor:
Stephen K. Wilke, Abdulrahman Al-Rubkhi, Chihiro Koyama, Takehiko Ishikawa, Hirohisa Oda, Brian Topper, Elizabeth M. Tsekrekas, Doris Möncke, Oliver L. G. Alderman, Vrishank Menon, Jared Rafferty, Emma Clark, Alan L. Kastengren, Chris J. Benmore, Jan Ilavsky, Jörg Neuefeind, Shinji Kohara, Michael SanSoucie, Brandon Phillips, Richard Weber
Publikováno v:
npj Microgravity, Vol 10, Iss 1, Pp 1-11 (2024)
Abstract The relationships between materials processing and structure can vary between terrestrial and reduced gravity environments. As one case study, we compare the nonequilibrium melt processing of a rare-earth titanate, nominally 83TiO2-17Nd2O3,
Externí odkaz:
https://doaj.org/article/32191774454c47699d22fbd763f4fcd6
Autor:
Hirokazu Masai, Shinji Kohara, Toru Wakihara, Yuki Shibazaki, Yohei Onodera, Atsunobu Masuno, Sohei Sukenaga, Koji Ohara, Yuki Sakai, Julien Haines, Claire Levelut, Philippe Hébert, Aude Isambert, David A. Keen, Masaki Azuma
Publikováno v:
Communications Chemistry, Vol 6, Iss 1, Pp 1-9 (2023)
Abstract The topology of amorphous materials can be affected by mechanical forces during compression or milling, which can induce material densification. Here, we show that densified amorphous silica (SiO2) fabricated by cold compression of siliceous
Externí odkaz:
https://doaj.org/article/6fcaf7b104134d8695eccfa26b29c78c
Autor:
Hirokazu Masai, Hiromi Kimura, Naoyuki Kitamura, Yuka Ikemoto, Shinji Kohara, Atsunobu Masuno, Yasuhiro Fujii, Takamichi Miyazaki, Takayuki Yanagida
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Recently, spark plasma sintering (SPS) has become an attractive method for the preparation of solid-state ceramics. As SPS is a pressure-assisted low-temperature process, it is important to examine the effects of temperature and pressure on
Externí odkaz:
https://doaj.org/article/ac64da47d44640c6b8d8e4101c35a89e
Autor:
Hideki Hashimoto, Yohei Onodera, Shuta Tahara, Shinji Kohara, Koji Yazawa, Hiroyo Segawa, Motohiko Murakami, Koji Ohara
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract The fabrication of novel oxide glass is a challenging topic in glass science. Alumina (Al2O3) glass cannot be fabricated by a conventional melt–quenching method, since Al2O3 is not a glass former. We found that amorphous Al2O3 synthesized
Externí odkaz:
https://doaj.org/article/b901e1ce319046fbbeac734521822ec3
Autor:
Shinji Kohara, Motoki Shiga, Yohei Onodera, Hirokazu Masai, Akihiko Hirata, Motohiko Murakami, Tetsuya Morishita, Koji Kimura, Kouichi Hayashi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Abstract The network topology in disordered materials is an important structural descriptor for understanding the nature of disorder that is usually hidden in pairwise correlations. Here, we compare the covalent network topology of liquid and solidif
Externí odkaz:
https://doaj.org/article/85a1e24fbce84eaa894e551addab5c25
Autor:
Stefan Karlsson, Shinji Kohara
Publikováno v:
Frontiers in Materials, Vol 9 (2022)
Externí odkaz:
https://doaj.org/article/5a57013a5dc143089a65f5000808f96c
Autor:
Koji Kimoto, Motoki Shiga, Shinji Kohara, Jun Kikkawa, Ovidiu Cretu, Yohei Onodera, Kazuo Ishizuka
Publikováno v:
AIP Advances, Vol 12, Iss 9, Pp 095219-095219-6 (2022)
The crystallographic structures of disordered materials are typically analyzed using diffractometry techniques, such as x-ray diffraction (XRD), neutron diffraction (ND), and electron diffraction (ED). Here, we demonstrate a novel technique to analyz
Externí odkaz:
https://doaj.org/article/281593365aa9498b84dca55ba3114ea7