抄録
Polycrystals of yttria stabilized cubic zirconia (Y-CSZ) with small amounts of additives (Al2O3 or TiO2) were deformed at 1523 to 1750K in air. TiO2 is thought to dissolve into lattice, whereas Al2O3 segregates at grain boundaries. The effect of those additives on strain rate gives the information on deformation mechanism. The addition of Ti, as well as Al, to Y-CSZ enhanced the strain rates in deformation of Y-CSZ, and the effective grain-boundary diffusion coefficients were calculated to be higher than those in undoped Y-CSZ, which suggests Ti, as well as Al, at grain boundaries affects the cation diffusion in CSZ.
