Journal
SCRIPTA MATERIALIA
Volume 68, Issue 9, Pages 727-730Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.01.010
Keywords
Ceramics; Thermal barrier coating; First-principles electron theory; Anisotropy
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Funding
- National Natural Science Foundation [50232020, 50572042]
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The quasi-harmonic approximation combined with first-principles calculations are employed to study the thermal conductivities of rare earth zirconate. The thermal conductivities are estimated using Slack's model. Good agreement between theory and experiments is observed at high temperature. The anisotropy of minimum thermal conductivity of Ln(2)Zr(2)O(7) pyrochlore is discussed based on Clarke's model. The thermal conductivities are plotted in three-dimensional space and the projections at (001) and (110) crystal planes are also illustrated. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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