Chemical characterization of dislocation in yttria-stabilized zirconia
This study demonstrates that a space charge layer is formed on dislocation during mechanical deformation at elevated temperature. High density of dislocation lines is generated in bulk single crystalline Y2O3 stabilized ZrO2 (YSZ) by uniaxial compression at elevated temperature. The creation of dislocation is proven with transmission electron microscopy (TEM). Then, energy-dispersive X-ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS) are used to explore the changes in the composition on and away from the dislocation lines. Also, it is clarified that segregation of dopant atoms (yttrium) on the dislocation line is induced by high temperature annealing. Comparing the compositional variations with and without thermal annealing, we study the space charge layer formed on dislocation lines in a doped system.