The mechanism of grain growth at general grain boundaries in SrTiO3

In this work anisotropic motion of disconnections at general grain boundaries in SrTiO3 was detected insitu at 1030 degrees C, 1040 degrees C and 1050 degrees C using transmission electron microscopy. The same anisotropic motion of ledges and terraces at the surfaces of SrTiO3 was detected in-situ. These results corroborate previous ex-situ studies on disconnection motion in SrTiO3, and experimentally confirm that anisotropic disconnection motion is the mechanism of grain growth. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.