This paper presents data on phase transitions in vanadium pentoxide induced by electron beam irradiation in a high resolution electron microscope. The results show that the concentration gradient resulting from loss of oxygen from the surface drives a number of phase transitions. Two intermediate phases with orthorhombic structures, V4O9 and a modification of V6O13, were observed. The final product was a vanadium monoxide with a rock-salt type structure. The end product and the intermediate phases have a well defined orientational relationship with the initial V2O5 phase, when the incident electron beam is along  or  of the V2O5. The average grain size of the final phase was proportional to the inverse square root of the flux of electrons, indicating diffusion-controlled nucleation.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics