High-temperature deformation and fracture of Bi--Sr--Ca--Cu--O superconductors

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1994.0541· OSTI ID:5261845

Goretta, K C; Zamirowski, E J ^[1]; Calderon-Moreno, J M ^[2]; Miller, D J; Chen, N; Holesinger, T G; Routbort, J L ^[3]

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1. Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439-4838 (United States)
2. Departamento de Fisica de la Materia Condensada, Universidad de Sevilla, 41080 Sevilla (Spain)
3. Materials Science Division, Argonne Laboratory, Argonne, Illinois 60439-4838 (United States)

Dense polycrystalline Bi[sub 2]Sr[sub 2]CuO[sub [ital x]] (2201), Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] (2212), and (Bi,Pb)[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub [ital x]] (2223) specimens were compressed in air at 730--835 [degree]C. All of the materials exhibited an apparent steady-state creep response. Strain rate was proportional to stress to the 3.1--3.8 power. Apparent activation energies for the deformation processes were 520[plus minus]50 kJ/mole for the 2201, 630[plus minus]210 kJ/mole for the 2212, and 960[plus minus]210 kJ/mole for the 2223. Transmission electron microscopy revealed substantial generation and propagation of basal-plane dislocations during deformation. Few nonbasal-plane dislocations were observed. Intergranular fracture was evident in all deformed samples, and intragranular fracture was evident along the basal planes of some grains. It is suggested that the kinetics of fracture were determined by dislocation motion within the grains.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5261845
• Journal Information: Journal of Materials Research; (United States), Journal Name: Journal of Materials Research; (United States) Vol. 9:3; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COMPRESSION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
CUPRATES
DEFORMATION
DISLOCATIONS
ELECTRON MICROSCOPY
FRACTURE PROPERTIES
HIGH-TC SUPERCONDUCTORS
KINETICS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY