Effect of Stoichiometry and Ordering on the Microstructure of Titanium Monoxide TiOy

Abstract

The structure of titanium monoxide TiOy with different stoichiometries and long-range order degrees was studied by using X-ray diffraction, electron backscatter diffraction, Raman spectroscopy, and electron microscopy methods. It was established that the composition of the phases formed in annealed TiOy depends on the titanium monoxide stoichiometry. A new phase precipitation mechanism is proposed. The migration of vacancies in dislocations and their accumulation on grain boundaries play an important role in the formation of new phases. The stoichiometry of quenched titanium monoxide (TiOy) was found to affect the intensity of the peak associated with the vibrational mode of the Ti-O bond in Raman spectra. Copyright © 2020 American Chemical Society.