Reduction of microcracking in YMnO3 ceramics by Ti substitution
authors Tomczyk, M; Senos, AMOR; Reaney, IM; Vilarinho, PM
nationality International
journal SCRIPTA MATERIALIA
author keywords YMnO3; Ti doping; Microstructure; Microcracking
keywords THERMAL-EXPANSION ANISOTROPY; ORIGIN
abstract Microcracking in YMnO3 ceramics originates from a combination of 3.7% volume change and strong anisotropy in the thermal expansion coefficient of the hexagonal structure. In this paper, the effect of Ti doping on the microstructure, structure and dielectric response of YMnO3 ceramics is studied. Lattice anisotropy of the hexagonal cell markedly decreased with increasing Ti, reducing the residual stresses created at the high-temperature phase transition and commensurately decreasing the crack density (3.2 vol.% YMnO3 to 0.9 vol.% YMn0.9Ti0.1O3). These results represent the first systematic work to reduce microcracking in YMnO3-based ceramics. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 1359-6462
year published 2012
volume 67
issue 5
beginning page 427
ending page 430
digital object identifier (doi) 10.1016/j.scriptamat.2012.04.042
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000307434000002
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journal analysis (jcr 2019):
journal impact factor 5.079
5 year journal impact factor 5.044
category normalized journal impact factor percentile 79.46
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