Melt-textured YBa2Cu3O7-x wires having plate-like grains
Yamashita, T., Bhargava, A., Golden, S.J., Barry, J.C., Page, D., & Mackinnon, I.D.R. (1997) Melt-textured YBa2Cu3O7-x wires having plate-like grains. Materials Letters, 30(2-3), pp. 223-229.
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 YBCO wires with two different compositions: YBa1.5Cu2.9O7-x, and YBa1.8Cu3.0O7-x. Wires are extruded from a mixture of precursor powders (formed by a coprecipitation process) then textured by firing in a moving furnace. Size of secondary phases such as barium cuprate and copper oxide, and overall composition of the sample affect the orientation of the fine grains. At zero magnetic field, the YBa1.5Cu2.9O7-x wire shows the highest critical current density of 1,450 Acm-2 and 8,770 Acm-2 at 77K and 4.2K, respectively. At 1 T, critical current densities of 30 Acm-2 and 200 Acm-2, respectively, are obtained at 77K and 4.2K. Magnetisation curves are also obtained for one sample to evaluate critical current density using the Bean model. Analysis of the microstructure indicates that the starting composition of the green body significantly affects the achievement of grain alignment via melt-texturing processes.
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|Item Type:||Journal Article|
|Additional Information:||Cited By (since 1996): 2 Export Date: 19 February 2013 Source: Scopus CODEN: MLETD Language of Original Document: English Correspondence Address: Yamashita, T.; Ctr. for Microsc. and Microanalysis, University of Queensland, St. Lucia, QLD 4072, Australia References: Palstra, T.T.M., Batlogg, B., Van Dover, R.B., Schneemier, L.F., Waszczak, J.V., (1989) Appl. Phys. Lett., 54, p. 763; Molozemoff, A.P., (1990) Mater. Res. Soc. Bulletin, 15 (6), p. 50; Jin, S., Tiefel, T.H., Sherwood, R.C., Davis, M.E., Van-Dover, R.B., Kammlott, G.W., Fastnacht, R.A., Keith, H.D., (1988) Appl. Phys. Lett., 52, p. 2074; Udayan, D., Natarajan, S., Seibt, E.W., (1991) Physica C, 183, p. 83; Bhargava, A., Mackinnon, I.D.R., Yamashita, T., Page, D., (1995) Physica C, 241, p. 53; Golden, S.J., Yamashita, T., Bhargava, A., Barry, J.C., Mackinnon, I.D.R., Page, D., (1993) Physica C, 217, p. 313; Yamashita, T., Bhargava, A., Golden, S., Zhao, R., Page, D., Barry, J.C., Mackinnon, I.D.R., Processing of long lengths of superconductors (1993) The Minerals, Metals and Materials Society, p. 113. , eds. U. Balachandran, E.W. Collings and A. Goyal, Pennsylvania; Golden, S.J., Yamashita, T., Bhargava, A., Barry, J.C., Mackinnon, I.D.R., (1994) Physica C, 221, p. 85; Kingery, W.D., Bowen, H.K., Uhlmann, D.R., (1976) Introduction to Ceramics, 2nd Ed., , Wiley-Interscience, New York; Izumi, T., Nakamura, Y., Sung, T.H., Shiohara, Y., (1991) Advances in Superconductivity, 4, p. 429. , eds. H. Hayakawa and N. Koshizuka Springer, Tokyo; McGinn, P.J., Chen, W., Zhu, N., Balachandran, U., Lanagan, M.T., (1990) Physica C, 165, p. 480; Murakami, M., Gotoh, S., Koshizuka, N., Tanaka, S., Matsushita, T., Kambe, S., Kitazawa, K., (1990) Cryogenics, 30, p. 390|
|Keywords:||Critical current density, Melt-texturing, Moving furnace, YBCO, high temperature superconductor, Melt texturing, Well oriented plate like fine grains, Composition effects, Crystal microstructure, Fabrication, Magnetization, Oxide superconductors, Strength of materials, Yttrium compounds, Superconducting wire|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Ceramics (091201)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Functional Materials (091205)
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||25 Feb 2013 22:48|
|Last Modified:||25 Feb 2013 22:48|
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