Compressive creep of dense Bi sub 2 Sr sub 1. 7 CaCu sub 2 O sub x

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1992.2360· OSTI ID:7050185

Routbort, J L ^[1]; Goretta, K C ^[2]; Miller, D J ^[1]; Kazelas, D B ^[2]; Clauss, C; Dominguez-Rodriguez, A ^[3]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439-4838 (United States)
2. Materials and Components Technology Division, Argonne National Laboratory, Argonne, Illinois 60439-4838 (United States)
3. Department of Condensed Matter Physics, Universidad de Sevilla, 41080 Sevilla (Spain)

Dense polycrystalline Bi{sub 2}Sr{sub 1.7}CaCu{sub 2}O{sub {ital x}} (2212) was deformed from 780--835 {degree}C in oxygen partial pressures, {ital P}{sub O{sub 2}}, of 10{sup 3} to 2{times}10{sup 4} Pa. Results could be divided into two stress regimes: one at lower stress in which the steady-state creep rate, {dot {epsilon}}, was proportional to stress, {sigma}, having an activation energy of 990{plus minus}190 kJ/mole and being independent of {ital P}{sub {ital O}{sub 2}}, and another at higher stress in which {dot {epsilon}} was proportional to {sigma}{sup {ital n}}, with {ital n}{approx}5--6. Transmission electron microscopy supported the interpretation that in the lower-stress viscous regime, creep was controlled by diffusion, whereas dislocation glide and microcracking were responsible for strain accommodation at higher stresses.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7050185
• Journal Information: Journal of Materials Research; (United States), Journal Name: Journal of Materials Research; (United States) Vol. 7:9; ISSN JMREE; 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
CREEP
CRYSTALS
DEFORMATION
HIGH-TC SUPERCONDUCTORS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS