Compressive creep of YBa sub 2 Cu sub 3 O sub x

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1990.2766· OSTI ID:6194429

Goretta, K C; Routbort, J L; Biondo, A C; Gao, Y ^[1]; de Arellano-Lopez, A R; Dominguez-Rodriguez, A ^[2]

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1. Argonne National Laboratory, Argonne, Illinois 60439-4838 (US)
2. Universidad de Sevilla, 41080 Sevilla, (Spain)

YBa{sub 2}Cu{sub 3}O{sub {ital x}} was deformed from 850 to 980 {degree}C in oxygen partial pressures of 10{sup 3} to 10{sup 5} Pa. Steady-state creep rate, {dot {epsilon}}, to {ital P}(O{sub 2}) from 10{sup 4} to 10{sup 5} Pa could be expressed as {dot {epsilon}}={ital A}{sigma}{sup 1.0}({ital GS}){sup {minus}2.8{plus minus}0.6} exp{minus}(970{plus minus}130 kJ/mole)/R{ital T}, where {ital A} is a constant, {sigma} the steady-state stress, GS the average grain size, and R and {ital T} have their usual meanings. For {ital P}(O{sub 2}) from 10{sup 3} to 3{times}10{sup 3} Pa, the activation energy decreased to about 650 kJ/mole and for a given temperature creep kinetics were much faster. The data and microscopic observations indicated that creep occurred by diffusional flow. Comparisons with diffusion data for YBa{sub 2}Cu{sub 3}O{sub {ital x}} suggested that Y or Ba may be rate-controlling diffusing species.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6194429
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 5:12; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COMPRESSION
COPPER COMPOUNDS
COPPER OXIDES
CREEP
DIFFUSION
ELEMENTS
ENERGY
LOW PRESSURE
MECHANICAL PROPERTIES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES