Little was known about the dislocation core and the related pipe diffusion in

oxides. Interesting features can be gained from irradiation induced defect

nucleation along dislocation lines. In yttrium sesquioxide Y2O3, it was observed

that the pipe diffusion was the driving force of nucleation of extended defects

which involves the diffusion of both ions, metal and oxygen. A periodic

distribution of defects along the dislocation was interpreted in terms of dislocation

core instability based on the effect known as Rayleigh instability.

Dislocation Core and Pipe Diffusion in Y2O3. R.J.Gaboriaud: Journal of Physics D,

2009, 42[13], 135410