Abstract
The effect of co-doping on the elastic modulus of 7 wt-% yttria stabilised zirconia has been investigated through nanoindentation tests of five ternary zirconia based oxides in the present study. It is revealed that the samples co-doped with pentavalent oxides, in general, have a lower elastic modulus compared to the samples co-doped with trivalent oxides. Co-dopant cations with larger mass show a significant impact on the reduction of the elastic modulus. Both large cation radius and increased oxygen vacancy concentration decrease the elastic modulus.
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