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High-temperature deformation and grain growth in fine-grained zirconia

✍ Scribed by Yu-Ichi Yoshizawa; Taketo Sakuma

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
859 KB
Volume
40
Category
Article
ISSN
0013-7944

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✦ Synopsis

The effects of grain size on high-temperature deformation and strain-induced grain growth were examined in fine-grained tetragonal zlrconia polycrystals (TZP) at 1400Β°C. The Sne-grained TZP, with a grain size less than about 1 pm, were superplasticahy deformed at this temperature. Superplastic deformation was characterized by the small work hardening during the deformation. A small work hardening in superplastic deformation was principally caused by the stress increase due to grain growth. The grain growth during deformation consisted of the static grain growth and the strain-induced one. The strain-induced grain growth was found to be proportional to strain.

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