The effect of grain boundary segregation on superplastic behavior in cation-doped 3Y-TZP

Superplastic behavior in 3Y-TZP is sensitively affected by 0.2 mol% of cation-doping. The flow stress in unsoluble cation-doped 3Y-TZP is correlated well with ionic radius of dopant-cation as well as that in soluble cation-doped 3Y-TZP. Results in HREM-EDS analysis indicates that the dopant effect on the superplasticity must be caused by the grain boundary segregation of dopant cation. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.