TY - JOUR
T1 - Strain Hardening in Superplastic Codoped Yttria-Stabilized Tetragonal-Zirconia Polycrystals
AU - Sasaki, Kazutaka
AU - Nakano, Manabu
AU - Mimurada, Junpei
AU - Ikuhara, Yiichi
AU - Sakuma, Taketo
PY - 2001/12
Y1 - 2001/12
N2 - The superplastic characteristics of 3-mol%-yttria-stabilized tetragonal-zirconia polycrystals (3Y-TZP) were drastically improved by the combined addition of germanium oxide and other oxides (titanium, magnesium, and calcium), resulting in up to 1000% elongation under optimum conditions. Extensive work hardening of the codoped compositions for temperatures >1400°C was observed. Dynamic grain growth was not a sufficient mechanism to explain this anomalous high strain hardening. The appearance of a cubic phase that caused abnormal grain growth during testing may have resulted in increased flow stress, which resulted in exaggerated work hardening.
AB - The superplastic characteristics of 3-mol%-yttria-stabilized tetragonal-zirconia polycrystals (3Y-TZP) were drastically improved by the combined addition of germanium oxide and other oxides (titanium, magnesium, and calcium), resulting in up to 1000% elongation under optimum conditions. Extensive work hardening of the codoped compositions for temperatures >1400°C was observed. Dynamic grain growth was not a sufficient mechanism to explain this anomalous high strain hardening. The appearance of a cubic phase that caused abnormal grain growth during testing may have resulted in increased flow stress, which resulted in exaggerated work hardening.
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U2 - 10.1111/j.1151-2916.2001.tb01124.x
DO - 10.1111/j.1151-2916.2001.tb01124.x
M3 - Article
AN - SCOPUS:0035790828
SN - 0002-7820
VL - 84
SP - 2981
EP - 2986
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 3-12
ER -