Design, preparation and thermal properties of (La0.4Sm 0.5Yb0.1)2Zr2O7 ceramic for thermal barrier coatings

L. Liu*, Z. H. Ma, F. C. Wang, Q. Xu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Based on the theory of phonon transport and thermal expansion, a new complex rare-earth zirconate ceramic (La0.4Sm0.5Yb 0.1)2Zr2O7, with low thermal conductivity and high thermal expansion coefficient, has been designed. The complex rare-earth zirconate (La0.4Sm0.5Yb 0.1)2Zr2O7 powder for thermal barrier coatings (TBCs) was synthesized by coprecipitation-calcination method. The phase, microstructure and thermal properties of the new material were investigated. The results revealed that single phase (La0.4Sm 0.5Yb0.1)2Zr2O7 with pyrochlore structure was synthesized. The thermal conductivity and the thermal expansion coefficient of the designed complex rare-earth zirconate ceramic is about 1.3W/m·K and 10.5×10-6/K, respectively. These results imply that (La0.4Sm0.5Yb0.1) 2Zr2O7 can be explored as the candidate material for the ceramic layer in TBCs system.

Original languageEnglish
Title of host publicationHigh-Performance Ceramics VII
PublisherTrans Tech Publications Ltd.
Pages469-473
Number of pages5
ISBN (Print)9783037854259
DOIs
Publication statusPublished - 2012
Event7th China International Conference on High-Performance Ceramics, CICC-7 - Xiamen, China
Duration: 4 Nov 20117 Nov 2011

Publication series

NameKey Engineering Materials
Volume512-515
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference7th China International Conference on High-Performance Ceramics, CICC-7
Country/TerritoryChina
CityXiamen
Period4/11/117/11/11

Keywords

  • Complex rare-earth zirconate
  • Thermal barrier coating
  • Thermal properties

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Liu, L., Ma, Z. H., Wang, F. C., & Xu, Q. (2012). Design, preparation and thermal properties of (La0.4Sm 0.5Yb0.1)2Zr2O7 ceramic for thermal barrier coatings. In High-Performance Ceramics VII (pp. 469-473). (Key Engineering Materials; Vol. 512-515). Trans Tech Publications Ltd.. https://doi.org/10.4028/www.scientific.net/KEM.512-515.469