Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Akihisa Kubota"'
Autor:
Kouki Hasegawa, Shigeru Tanaka, Daisuke Inao, Masatoshi Nishi, Akihisa Kubota, Kazuyuki Hokamoto
Publikováno v:
Journal of Materials Research and Technology, Vol 24, Iss , Pp 6730-6738 (2023)
Press-forming technology is excellent for mass production. However, for micrometer-order forming, manufacturing press tools is unprofitable. Because laser-induced shock waves cannot rapidly accelerate heavier workpieces into molds, the workpieces are
Externí odkaz:
https://doaj.org/article/7a17d79965a04305bc95027c29badf2a
Publikováno v:
Photoacoustics, Vol 31, Iss , Pp 100486- (2023)
We present a picosecond optoacoustic technique for mapping both the longitudinal sound velocity v and the refractive index n in solids by automated measurement at multiple probe incidence angles in time-domain Brillouin scattering. Using a fused sili
Externí odkaz:
https://doaj.org/article/0aaee06bc3f949eca6b58ee92e80dc3f
Autor:
Kouki Hasegawa, Shigeru Tanaka, Ivan Bataev, Daisuke Inao, Masatoshi Nishi, Akihisa Kubota, Kazuyuki Hokamoto
Publikováno v:
Materials & Design, Vol 203, Iss , Pp 109607- (2021)
Previously, a novel sub-micron shock imprinting technique based on explosive-derived underwater shock waves was developed. In general, an underwater shock wave, whose high-pressure duration is considerably larger than that of laser-induced shock wave
Externí odkaz:
https://doaj.org/article/2ca2920cbcc64fb0845ad8b9122623d4
Publikováno v:
Materials & Design, Vol 198, Iss , Pp 109341- (2021)
Laser shock imprinting (LSI) is an emerging method for creating sub-micrometer and nanoscale reliefs on thin metal foils. This report proposes using underwater shockwaves, generated by detonating an explosive charge, for high-quality imprinting as an
Externí odkaz:
https://doaj.org/article/5af472bac6944a6e883efb7002b43ab9
Autor:
Kouki Hasegawa, Shigeru Tanaka, Ivan Bataev, Daisuke Inao, Matatoshi Nishi, Akihisa Kubota, Kazuyuki Hokamoto
Publikováno v:
Materials, Vol 15, Iss 5, p 1727 (2022)
In the last decade, a new technique has been developed for the nanoimprinting of thin-metal foils using laser-induced shock waves. Recent studies have proposed replacing metal or silicone molds with inexpensive polymer molds for nanoimprinting. In ad
Externí odkaz:
https://doaj.org/article/5aee5d64ce1c4c14be9d93a519aa1cdf
Autor:
Shuichi Hiza, Ken Imamura, Yusuke Shirayanagi, Koji Yoshitsugu, Yuki Takiguchi, Kunihiko Nishimura, Hideki Takagi, Hideaki Yamada, Akihisa Kubota, Mikio Yamamuka
Publikováno v:
IEEJ Transactions on Electronics, Information and Systems. 142:354-359
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc6d064940a87e24fc3812b031ec029e
https://doi.org/10.1541/ieejeiss.142.354
https://doi.org/10.1541/ieejeiss.142.354
Publikováno v:
Manufacturing Letters. 27:8-12
Large-area nano-/microarray production in a single shot is a significant challenge in laser shock imprinting (LSI). Materials that can be used to fabricate molds easily will advance LSI techniques. Thus, here, an Al foil was compression-molded in a n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a7e771eb39c426cf917ef0847d1a181
https://doi.org/10.1016/j.mfglet.2020.11.004
https://doi.org/10.1016/j.mfglet.2020.11.004
Cerium oxide (CeO2-x) nanoparticles with high Ce3+ proportion synthesized by pulsed plasma in liquid
Autor:
Akira Yoshiasa, Weijian Ma, Makoto Tokuda, Akihisa Kubota, Shota Tamura, Shinichi Yoda, Tsutomu Mashimo, Hiroshi Isobe, Michio Koinuma, Masayuki Tsushida
Publikováno v:
Ceramics International. 46:26502-26510
Cerium oxide (CeO2-x) nanoparticles were synthesized using a simple one-step method known as the pulsed plasma in liquid (PPL). XRD analysis showed the production of pure cubic cerium oxide (Fm 3 ‾ m). HRTEM and XANES analysis confirmed the monopha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3eeed8024621d395a8b637faf8ac064
https://doi.org/10.1016/j.ceramint.2020.07.093
https://doi.org/10.1016/j.ceramint.2020.07.093
Autor:
Akihisa Kubota
Publikováno v:
International Journal of Automation Technology. 13:230-236
To remove the microroughness and subsurface damage on the SiC and GaN surface efficiently, a surface finishing technique using a magnetic tool holding iron particles in a hydrogen peroxide solution is developed. This technique utilizes OH radicals ge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99555195f079852a7d6e905623e7d870
https://doi.org/10.20965/ijat.2019.p0230
https://doi.org/10.20965/ijat.2019.p0230
Autor:
Akitaka Iwakiri, Akihisa Kubota
Publikováno v:
Precision Engineering. 56:69-79
In this study, the tribochemical polishing of a bulk GaN substrate, prepared by hydride vapor phase epitaxy, was investigated. Two different types of silica plates, a quartz glass plate and a soda-lime glass plate, were used as a polishing plate to p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::226c100b69de02c01dd4f3e07c702ebd
https://doi.org/10.1016/j.precisioneng.2018.09.014
https://doi.org/10.1016/j.precisioneng.2018.09.014