Abstract
Superplastic ceramics having high ductility at elevated temperatures can be formed to complicated shapes by plastic working. Their applications to nuclear energy fields are very promising because of their superior mechanical and thermal properties. However, there are few studies on mechanical properties of superplastic 3mol% yttria containing tetragonal zirconia polycrystals (3Y-TZP). In this work, balding and compressive strengths were studied. Three point bending tests were carried out with different span length to clarify the strength change due to size effect. The Weibull strength theory was applied to explain the strength. It was found that the bending strength distribution is well fit to the Weibull statistical plot, and well explains the strength behavior under different span length. Compressive strength data were also plotted in the Weibull statistical form, and it was also found that the compressive strength also fit well to the Weibull statistical theory.
Published Version
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