Diffusional creep of BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{alpha} mixed conductors.
Journal Article
·
· Solid State Ionics
Compressive creep tests of BaCe0.8Y0.2O3-a polycrystals were conducted in Ar to determine deformation rate and calculate the diffusivity of the rate-controlling diffusing species for diffusional creep. At 1200-1450 C, the steady-state strain rate ({dot {var_epsilon}}) could be expressed as {dot {var_epsilon}} = A{sigma}{sup 1.1{+-}0.1} exp[(-343{+-}30 kJ/mole)/RT], where A is a constant, {sigma} is the steady-state stress, R is the universal gas constant, and T is the absolute temperature. The data and microstructural observations indicated that creep occurred by a grain-boundary-sliding mechanism, which was probably controlled by lattice diffusion of either Ba or Ce.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938349
- Report Number(s):
- ANL/ET/JA-29522
- Journal Information:
- Solid State Ionics, Journal Name: Solid State Ionics Journal Issue: 1998 Vol. 111; ISSN 0167-2738; ISSN SSIOD3
- Country of Publication:
- United States
- Language:
- ENGLISH
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