Zobrazeno 1 - 10
of 234
pro vyhledávání: '"Masato Murakami"'
Autor:
Joseph Longji Dadiel, Sugali Pavan Kumar Naik, Paweł Pęczkowski, Jun Sugiyama, Hiraku Ogino, Naomichi Sakai, Yokoyama Kazuya, Tymon Warski, Anna Wojcik, Tetsuo Oka, Masato Murakami
Publikováno v:
Materials, Vol 14, Iss 23, p 7395 (2021)
In this study, high-density magnesium diboride (MgB2) bulk superconductors were synthesized by spark plasma sintering (SPS) under pressure to improve the field dependence of the critical current density (Jc-B) in MgB2 bulk superconductors. We investi
Externí odkaz:
https://doaj.org/article/f6c1b843c14749f68aa793015a301a00
Publikováno v:
Materials, Vol 12, Iss 13, p 2173 (2019)
The flux pinning properties of reacted-and-pressed Ba0.6K0.4Fe2As2 powder were measured using magnetic hysteresis loops in the temperature range 20 K ≤ T ≤ 35 K. The scaling analysis of the flux pinning forces ( F p = j c × B , with j c denoting
Externí odkaz:
https://doaj.org/article/7abe0659675442018fbded21e8674d98
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 34:1297-1301
We successfully refined a cheap commercial boron powder by means of high-energy ultra-sonication and utilized it in synthesis of bulk MgB2. Rietveld phase analysis of X-ray diffraction pattern revealed completely formed MgB2 with a low amount of MgO.
Autor:
Muralidhar Miryala, Nurhidayah Mohd Hapipi, Masato Murakami, Mohd Mustafa Awang Kechik, Oon Jew Lee, Sai Srikanth Arvapalli, Kar Ban Tan, Soo Kien Chen
Publikováno v:
Ceramics International. 46:23041-23048
In this work, magnesium diboride, MgB2 samples were prepared by using magnesium, Mg powder and carbon-encapsulated boron, B powder (1.35 wt% carbon) with addition of dysprosium oxide, Dy2O3 and lanthanum oxide, La2O3 as dopants. Different weight perc
Autor:
Yiteng Xing, Richard Retoux, P. Bernstein, Masato Murakami, S. S. Arvapalli, Masaki Higuchi, Miryala Muralidhar, Jacques G. Noudem
Publikováno v:
Journal of the American Ceramic Society. 103:6169-6175
Autor:
Miryala Muralidhar, Bruno Douine, Kévin Berger, Quentin Nouailhetas, Anjela Koblischka-Veneva, Masato Murakami, Michael Rudolf Koblischka
Publikováno v:
IEEE Transactions on Applied Superconductivity. 29:1-5
We compare the temperature and field dependence of the critical current densities of high- $T_c$ superconductor materials intended for various bulk applications such as trapped-field magnets. This comprises bulk samples of YBa $_2$ Cu $_3$ O $_x$ (YB
Publikováno v:
IEEE Transactions on Applied Superconductivity. 29:1-5
Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density ( J c) and high trapped magnetic fields, which is attributed to the presence of pinning centers such as micro-sized Y2BaCuO5 (
Publikováno v:
IEEE Transactions on Applied Superconductivity. 29:1-4
To find a cheap and efficient way to produce high-performance bulk MgB2 superconductors, a series of samples produced with different contents of carbon-coated, nanometer-sized amorphous boron was prepared to improve the magnetic properties. A single-
Autor:
Michael Rudolf Koblischka, Jacques G. Noudem, Jörg Schmauch, Anjela Koblischka-Veneva, Masato Murakami
Publikováno v:
Journal of Microscopy
Journal of Microscopy, Wiley, 2019, 274 (3), pp.123-131. ⟨10.1111/jmi.12790⟩
Journal of Microscopy, 2019, 274 (3), pp.123-131. ⟨10.1111/jmi.12790⟩
Journal of Microscopy, Wiley, 2019, 274 (3), pp.123-131. ⟨10.1111/jmi.12790⟩
Journal of Microscopy, 2019, 274 (3), pp.123-131. ⟨10.1111/jmi.12790⟩
International audience; EBSD analysis can provide information about grain orientation, texture and grain boundary misorientation of bulk superconducting MgB2 samples intended for supermagnet applications. However, as the grain size of the MgB2 bulks
Publikováno v:
Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2019, 32 (10), pp.3155-3163. ⟨10.1007/s10948-019-5106-4⟩
Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2019, 32 (10), pp.3155-3163. ⟨10.1007/s10948-019-5106-4⟩
The transmission electron backscatter diffraction (t-EBSD) technique has proven to be an indispensable tool for the analysis of microstructures of superconducting samples, both high-Tc samples (YBa2Cu3Oy, Bi2Sr2CaCu2O8) as well as MgB2 or iron-based
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bfd34a1fb1162d8f514b20c4147a2b7
https://hal.univ-lorraine.fr/hal-03273544
https://hal.univ-lorraine.fr/hal-03273544