Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Duck Young Hwang"'
Autor:
Young-Seok Oh, Duck-Young Hwang, Seong-Hoon Kang, Jeong Whan Yoon, Howon Lee, Kook-Chae Chung
Publikováno v:
Metals and Materials International. 28:1697-1710
Numerical modeling was conducted to investigate the deformation behavior of powder mixture during multi-pass drawing processes for multi-filamentary MgB2 wire. A modified Drucker-Prager Cap (DPC) model with an elliptical cap surface using the new mat
Autor:
Yeon Suk Choi, Jung Tae Lee, Haigun Lee, Sehoon Jang, Jiman Kim, Young Gyun Kim, Duck Young Hwang, B. H. Yoo, Seungyong Hahn
Publikováno v:
Metals and Materials International. 25:1467-1476
In this study, tolerable bending diameters of reacted MgB2 wires fabricated to produce varying outer sheath materials, numbers of MgB2 filaments, and sheath layer thickness were investigated. The result showed that the tolerable bending diameters of
Autor:
Hee Rak Kim, Howon Lee, Seon-Myung Park, In Yong Moon, Se-Jong Kim, Duck-Young Hwang, Youngseok Oh, Seong-Hoon Kang
Publikováno v:
International Journal of Precision Engineering and Manufacturing. 20:1563-1572
The critical current density (Jc), which is a major performance parameter of low temperature superconducting Nb-46.5 wt%Ti wire, can be improved by uniformly dispersed fine α-Ti precipitates since they serve as a flux pinning center. The high volume
Autor:
Duck Young Hwang, Jiman Kim, Haigun Lee, Iksang Shin, Jung-Bin Song, Jong Cheol Kim, B. H. Yoo, Young-Gyun Kim, Ki-Hong Sim
Publikováno v:
IEEE Transactions on Applied Superconductivity. 28:1-6
In this paper, the superconducting properties of reacted mono- and multifilament MgB2 wires were investigated with regards to the bending diameter via a three-point bending test using a lab-made bending test probe. The wires were manufactured by Kisw
Publikováno v:
Journal of Nanoscience and Nanotechnology. 19:2404-2406
Niobium-titanium alloy is attractive materials for industrials as a superconducting magnets to high critical magnetic field and supercurrent density at -283 °C. The Nb-Ti alloy has been shown in earlier work to exhibit Van Gosh Sky microstructures.
Publikováno v:
Journal of the Korean Physical Society. 69:310-315
Unlike the NbTi superconducting wires used for high critical current density, NbTi wires for Magnetic resonance imaging (MRI) magnets have larger and fewer NbTi monofilaments and different cross sections, which show different superconducting properti
Publikováno v:
Surface and Coatings Technology. 206:3360-3365
The present work investigated the electrochemical behavior of Mg alloy subjected to micro arc oxidation coating for 120 s with respect to current frequencies from 60 Hz to 2000 Hz. The microstructure and chemical compound of thin coating layers with
Publikováno v:
Applied Surface Science. 256:6667-6672
The influence of the surface roughness of Mg alloys on the electrical properties and corrosion resistance of oxide layers obtained by plasma electrolytic oxidation (PEO) were studied. The leakage current in the insulating oxide layer was enhanced by
Publikováno v:
Thermochimica Acta. 499:100-105
Equal channel angular pressing (ECAP) has an advantage of being capable of achieving a submicron grain size. The 5083 Al alloy is a typical non-heat treatable Al–Mg based alloy that possesses many interesting characteristics as a structural materia
Publikováno v:
Korean Journal of Metals and Materials. 48:49-56