Melt-textured YBa2Cu3O7 − x wires having plate-like grains
作者： T. Yamashita , A. Bhargava , S.J. Golden , J.C. Barry , D. Page
DOI: 10.1016/S0167-577X(96)00201-7
关键词:
摘要: Abstract YBCO wires which consist of well oriented plate-like fine grains are fabricated using a moving furnace to achieve higher mechanical strength. Melt-texturing experiments have been undertaken on with two different compositions: YBa1.5Cu2.9O7−x, and YBa1.8Cu3.0O7−x. Wires extruded from mixture precursor powders (formed by coprecipitation process) then textured firing in furnace. Size secondary phases such as barium cuprate copper oxide, overall composition the sample affect orientation grains. At zero magnetic field, YBa1.5Cu2.9O7−x wire shows highest critical current density 1450 A cm−2 8770 at 77 K 4.2 K, respectively. 1 T, densities 30 200 cm−2, respectively, obtained K. Magnetisation curves also for one evaluate Bean model. Analysis microstructure indicates that starting green body significantly affects achievement grain alignment via melt-texturing processes.
uq.edu.au
elsevier.com参考文章(10)
Advances in superconductivity New York, NY (USA); Springer-Verlag New York Inc.. ,(1989) , 10.1007/978-4-431-68084-0
S. Jin, T. H. Tiefel, R. C. Sherwood, M. E. Davis, R. B. van Dover, G. W. Kammlott, R. A. Fastnacht, H. D. Keith, High critical currents in Y‐Ba‐Cu‐O superconductors Applied Physics Letters. ,vol. 52, pp. 2074- 2076 ,(1988) , 10.1063/1.99751
M. Murakami, S. Gotoh, N. Koshizuka, S. Tanaka, T. Matsushita, S. Kambe, K. Kitazawa, Critical currents and flux creep in melt processed high Tc oxide superconductors Cryogenics. ,vol. 30, pp. 390- 396 ,(1990) , 10.1016/0011-2275(90)90164-8
W. D. Kingery, D. R. Uhlmann, H. K. Bowen, R. Frieser, Introduction to Ceramics ,(1976)
T. T. M. Palstra, B. Batlogg, R. B. van Dover, L. F. Schneemeyer, J. V. Waszczak, Critical currents and thermally activated flux motion in high‐temperature superconductors Applied Physics Letters. ,vol. 54, pp. 763- 765 ,(1989) , 10.1063/1.101474
A.P. Malozemoff, The Magnetic Phase Diagram of High Tc Superconductors Mrs Bulletin. ,vol. 15, pp. 50- 54 ,(1990) , 10.1557/S0883769400059510
Atit Bhargava, Ian D.R. Mackinnon, Toru Yamashita, David Page, Bulk manufacture of YBCO powders by coprecipitation Physica C: Superconductivity. ,vol. 241, pp. 53- 62 ,(1995) , 10.1016/0921-4534(94)00638-5
S.J. Golden, T. Yamashita, A. Bhargarva, J.C. Barry, I.D.R. Mackinnon, D. Page, The extrusion of continuous lengths of YBa2Cu3O7-x wire using hydroxypropyl methylcellulose Physica C-superconductivity and Its Applications. ,vol. 217, pp. 313- 318 ,(1993) , 10.1016/0921-4534(93)90334-M
S.J. Golden, T. Yamashita, A. Bhargava, J.C. Barry, I.D.R. Mackinnon, The formation of YBa2Cu3O7-x in melt-texture heat treatments Physica C-superconductivity and Its Applications. ,vol. 221, pp. 85- 90 ,(1994) , 10.1016/0921-4534(94)90669-6
P.J. McGinn, W. Chen, N. Zhu, U. Balachandran, M.T. Lanagan, Texture processing of extruded YBa2Cu3O6+x wires by zone melting Physica C-superconductivity and Its Applications. ,vol. 165, pp. 480- 484 ,(1990) , 10.1016/0921-4534(90)90385-R