Commercially available BaTiO 3 powders were hot‐pressed 15 min at 1250 ★ C to yield dense (≥99.5% of theoretical), fine‐grained (∼0.45‐pun average) poly‐crystals. These were creep tested under compressive 5‐ to 60‐MPa applied stresses at 1150 ★ to 1250 ★ C. True strains reaching ‐0.50 were achieved without significant damage or structural change in the material. The observed flow behavior and microstructures are consistent with siructural superplastit. ity being the dominant deformation mode under the present testing conditions.
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Carry et al. (1986) studied this question.
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