Unusual atom displacements in TiO2 during flash sintering
March 10-15, 2019
We report on in-situ measurements of displacements for Ti and O atoms within a TiO2 unit cell during flash sintering, where one species (O) moves much more than the other. The heart of these investigations is focused on the hypothesis that colossal concentrations of defects, in the form of Frenkel pairs are generated which lead to abnormal kinetics of diffusion and phase transformations. These experiments will continue to provide new information which can be built into atomistic simulations to provide a scientific basis for the flash phenomena.
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Bola Yoon, Devinder Yadav, Rishi Raj, Sanjit Ghose, Pankaj Sarin, and Daniel Shoemaker, "Unusual atom displacements in TiO2 during flash sintering" in "Electric Field Enhanced Processing of Advanced Materials II: Complexities and Opportunities", Rishi Raj, University of Colorado, USA Olivier Guillon, Forschungzentrum Jülich, Germany Hidehiro Yoshida, National Institute for Materials Science, Japan Eds, ECI Symposium Series, (2019). https://dc.engconfintl.org/efe_advancedmaterials_ii/17