Synthesis, characterisation and thermophysical properties of LaGdCe2O7 ceramic for thermal barrier coatings

被引：2
|
作者：
Zhang, Hongsong [1 ]
Yan, Shuqing [2 ]
Chen, Xiaoge [3 ]
Li, Gang [1 ]
Wang, Xinli [1 ]
机构：
[1] Henan Inst Engn, Dept Mech Engn, Zhengzhou 450007, Peoples R China
[2] North China Inst Water Conservancy Hydroelect, Sch Math & Informat Sci, Zhengzhou 450002, Peoples R China
[3] Henan Inst Engn, Dept Construct Engn, Zhengzhou 450007, Peoples R China
来源：
MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷 / 05期
关键词：
Thermal barrier coatings; Rare earth ceria oxides; Thermophysical properties; Phonon scattering; CERIUM OXIDE; CONDUCTIVITY; EXPANSION; SYSTEM;
D O I：
10.1179/1433075X13Y.0000000167
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, LaGdCe2O7 ceramic was synthesised by solution reaction method. Its phase composition, microstructure and thermophysical properties were investigated respectively. X-ray diffraction result showed that single phase LaGdCe2O7 with fluorite structure was successfully synthesised. Scanning electron microscopy result revealed that the microstructure of the product was dense and no other unreacted oxides or interphases exist in the interfaces between grains. Its thermal expansion coefficient was higher than that of conventional 8YSZ, while its thermal conductivity was much lower than that of 8YSZ. The lower thermal conductivity of this product was mainly attributed to the differences in atomic weight and ionic radius between solute and host atoms. The results imply that LaGdCe2O7 ceramic can be used as candidate material for the ceramic layer in thermal barrier coatings.
引用
收藏
页码：392 / 396
页数：5
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