[Zurück]

M. Imayev, R. Daminov, M. Reissner, W. Steiner, M.V. Makarova, P.E. Kazin:
"Microstructure, texture and superconducting properties of Bi2212 ceramics, deformed by torsion under pressure";
Physica C: Superconductivity and its Applications, 467 (2007), S. 14 - 26.

Microstructure, texture and superconducting properties of Bi2212 ceramics, deformed by torsion under pressure

M.F. Imayeva, b, Corresponding Author Contact Information, E-mail The Corresponding Author, R.R. Daminova, b, M. Reissnernext terma, W. Steinera, M.V. Makarovac and P.E. Kazinc
aInstitute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, A-1040 Wien, Austria
bInstitute for Metals Superplasticity Problems, Russian Academy of Sciences, Khalturina 39, Ufa 450001, Russia
cChemistry Department, Moscow State University, Moscow 119992, Russia
Received 2 June 2007; revised 23 August 2007; accepted 27 August 2007. Available online 7 September 2007.

Abstract

A systematic investigation of the effect of high-temperature deformation by torsion under quasi-hydrostatic pressure on the microstructure, texture and superconducting properties of Bi2212 ceramics was carried out. Intercolony sliding was identified as the main mechanism of plastic deformation and basal texture formation. In all investigated deformation regimes the colony thickness did not change, only their length varied. The superconducting properties were analyzed as caused by the action of three main pinning centers: intracolonial lattice defects, low-angle colony boundaries and particles of secondary phases which appear during the decomposition of the Bi2212 phase near the melting point.

Bi2212 ceramics; Plastic deformation; Microstructure; Pinning

http://dx.doi.org/10.1016/j.physc.2007.08.003

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