Deformation of high-temperature superconductors

Conference · Mon Aug 01 04:00:00 EDT 1994

OSTI ID:10175466

Goretta, K C; Routbort, J L; Miller, D J; Chen, N ^[1]; Dominguez-Rodriguez, A; Jimenez-Melendo, M; De Arellano-Lopez, A R ^[2]

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1. Argonne National Lab., IL (United States)
2. Universidad of Sevilla (Spain). Departamento di Fisica de la Materia Condensada

Of the many families of high-temperature superconductors, only the properties of those discovered prior to 1989 - Y-Ba-Cu-O, Tl-Ba(Sr)-Ca-Cu-O, and Bi(Pb)-Sr-Ca-Cu-O - have been studied extensively. Deformation tests have been performed on YBa{sub 2}Cu{sub 3}O{sub x} (Y-123), YBa{sub 2}Cu{sub 4}O{sub x} (Y-124), TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} (Bi-2223). The tests have revealed that plasticity is generally limited in these compounds and that the rate-controlling diffusional kinetics for creep are very slow. Nevertheless, hot forming has proved to be quite successful for fabrication of bulk high-temperature superconductors, so long as deformation rates are low or large hydrostatic stresses are applied. Steady-state creep data have proved to be useful in designing optimal heat treatments for superconductors and in support of more-fundamental diffusion experiments. The high-temperature superconductors are highly complex oxides, and it is a challenge to understand their deformation responses. In this paper, results of interest and operant creep mechanisms will be reviewed.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Comision Interministerial de Ciencia y Tecnologia (Spain)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10175466
• Report Number(s): ANL/ET/CP--83876; CONF-940865--1; ON: DE94017085
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203
BARIUM OXIDES
BISMUTH OXIDES
CALCIUM OXIDES
CERAMICS
COPPER OXIDES
CREEP
DEFORMATION
GALLIUM OXIDES
HIGH-TC SUPERCONDUCTORS
KINETICS
LEAD OXIDES
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
STRONTIUM OXIDES
THALLIUM OXIDES
YTTRIUM OXIDES