TY - GEN
T1 - Design, preparation and thermal properties of (La0.4Sm 0.5Yb0.1)2Zr2O7 ceramic for thermal barrier coatings
AU - Liu, L.
AU - Ma, Z. H.
AU - Wang, F. C.
AU - Xu, Q.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - Complex rare-earth zirconate
KW - Thermal barrier coating
KW - Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=84862740743&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.512-515.469
DO - 10.4028/www.scientific.net/KEM.512-515.469
M3 - Conference contribution
AN - SCOPUS:84862740743
SN - 9783037854259
T3 - Key Engineering Materials
SP - 469
EP - 473
BT - High-Performance Ceramics VII
PB - Trans Tech Publications Ltd.
T2 - 7th China International Conference on High-Performance Ceramics, CICC-7
Y2 - 4 November 2011 through 7 November 2011
ER -