Superplasticity deformation behavior change of pure 3Y-TZP by grain growth.

Superplastic deformation behavior was examined in high-purity 3mol% Yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) with fine and coarse grains, and their deformation mechanism map was drawn. The fine grain material below 0.3m showed two deformation regions with stress exponent 2 at high stresses and 3 at low stresses, while the coarse grain material above 1m showed two deformation regions with stress exponent 1 at high stresses and 3 at low stresses. These deformation regions can be predicted by the obtained deformation mechanism map.