Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Tomokazu Sakagawa"'
Publikováno v:
Applied Sciences, Vol 9, Iss 7, p 1412 (2019)
Focusing condition such as numerical aperture (N.A.) has a great influence on the creation of molten area and the stable welding process in fusion micro-welding of glass. In this study, a picosecond pulsed laser of 1064 nm in wavelength and 12.5 ps i
Externí odkaz:
https://doaj.org/article/1c55e9db503e4f2fafb1ab3c612eb8af
Autor:
Martin Ruthandi Maina, Yasuhiro Okamoto, Reiki Inoue, Shin-ichi Nakashiba, Akira Okada, Tomokazu Sakagawa
Publikováno v:
Applied Sciences, Vol 8, Iss 12, p 2364 (2018)
Laser welding of copper is characterized by low and unstable light absorption around 1000 nm wavelength. Combination of high thermal conductivity and low melting point makes it difficult to obtain good welding quality and leads to low energy utilizat
Externí odkaz:
https://doaj.org/article/32507439e1fd4aea88bdca2ee5636392
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 4, Iss 5, Pp 875-882 (2010)
A pulsed Nd:YAG laser and a continuous diode laser were spatially superposed for higher absorption of laser beam to aluminum alloy. 12-20% increase in the bead width and 15-30% increase in the weld depth could be obtained by the superposition of cont
Externí odkaz:
https://doaj.org/article/30010848433f4fb4a3a117cd6bcfc43b
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 4, Iss 5, Pp 867-874 (2010)
Precision micro-machining without cracks and with a narrow heat affected zone is highly required for the effective use of high-performance material. For this purpose, it is expected that the higher harmonics of Nd:YAG laser could perform the precisio
Externí odkaz:
https://doaj.org/article/c8cc52e205d642c9b8d31127af86daa6
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 2, Iss 4, Pp 661-667 (2008)
Aluminum nitride and silicon carbide are expected as a useful material for the substrate in semiconductor industry because of their excellent properties. Precision micro-machining without crack and with little heat affected zone is required for their
Externí odkaz:
https://doaj.org/article/6e7858c1645a4b64816ff1cd240234bc
Autor:
Masafumi Oshita, Akira Okada, Norio Nishi, Tomokazu Sakagawa, Yasuhiro Okamoto, Togo Shinonaga
Publikováno v:
Journal of Materials Processing Technology. 240:255-261
In laser processing of silver nanowire transparent conductive film covered with an acrylic resin layer, effects of pulse duration on electrical insulation and surface quality were experimentally investigated by using nanosecond pulsed laser. The mini
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6fd566bc53c32ddefcae0c6105b5c4c
https://doi.org/10.1016/j.jmatprotec.2016.10.004
https://doi.org/10.1016/j.jmatprotec.2016.10.004
Autor:
Masafumi Oshita, Togo Shinonaga, Akira Okada, Yasuhiro Okamoto, Tomokazu Sakagawa, Norio Nishi
Publikováno v:
Procedia CIRP. 42:62-66
Processing characteristics of transparent conductive film containing silver nanowires by ns pulsed fiber lasers with various pulse duration were experimentally investigated in the view-points of insulating state and surface quality. The laser fluence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8431a184b4fcc6e4583b52220bcc061f
Autor:
Yasuhiro Okamoto, Tomokazu Sakagawa, Reiki Inoue, Martin Ruthandi Maina, Shin Ichi Nakashiba, Akira Okada
Publikováno v:
Applied Sciences, Vol 8, Iss 12, p 2364 (2018)
Applied Sciences
Volume 8
Issue 12
Applied Sciences
Volume 8
Issue 12
Laser welding of copper is characterized by low and unstable light absorption around 1000 nm wavelength. Combination of high thermal conductivity and low melting point makes it difficult to obtain good welding quality and leads to low energy utilizat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92ff36f750222c5c90b9d0c52c25f6ee
https://www.mdpi.com/2076-3417/8/12/2364
https://www.mdpi.com/2076-3417/8/12/2364
Effect of surrounding gas condition on surface integrity in micro-drilling of SiC by ns pulsed laser
Publikováno v:
Applied Physics B. 119:509-517
The influence of the surrounding gas conditions on the surface integrity in the micro-drilling of silicon carbide was experimentally investigated using ns pulsed laser of 266 nm wavelength. Moreover, micro-machining characteristics were observed usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71e5f64695109c5dc46a8e8db621eccc
https://doi.org/10.1007/s00340-015-6060-x
https://doi.org/10.1007/s00340-015-6060-x
Autor:
Shin Ichi Nakashiba, Yasuhiro Okamoto, Akira Okada, Tomokazu Sakagawa, Norio Nishi, Takehito Yokoyama
Publikováno v:
Journal of the Japan Society for Precision Engineering. 81:1033-1038
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::729517fb334b90708ab002ee8d1182d8
https://doi.org/10.2493/jjspe.81.1033
https://doi.org/10.2493/jjspe.81.1033