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Influence of grain boundary sliding on diffusion in yttria doped zirconia |
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| Authors: | Santonu Ghosh Sathya Swaroop Peter FielitzGuenter Borchardt Atul H. Chokshi |
| Affiliation: | a Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka 560012, India b Institut fuer Metallurgie, Technische Universitaet Clausthal, 38678 Clausthal - Zellerfeld, Germany c School of Science and Humanities, VIT University, Vellore 632 014, India |
| Abstract: | Grain boundary sliding during high temperature deformation can lead to stress concentrations and an enhancement of diffusion in mobile boundaries. Experiments were conducted on a fine grained 3 mol% yttria stabilized tetragonal zirconia, under conditions associated with superplastic flow involving grain boundary sliding. Tracer diffusion studies under creep conditions and without load indicate that there is no enhancement in either the lattice or grain boundary diffusivities. The experimental creep data are consistent with an interface controlled diffusion creep mechanism. |
| Keywords: | Grain boundaries Diffusion Superplasticity Zirconia Creep |
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