Preparation and Thermal Conductivity of Dy2Ce2O7 Ceramic Material

被引：17
作者：
Zhang Hongsong [1 ,2 ]
Liao Suran [3 ]
Guan Shaokang [2 ]
机构：
[1] Henan Inst Engn, Dept Mech Engn, Zhengzhou 451191, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450007, Peoples R China
[3] Henan Inst Engn, Dept Mat & Chem, Zhengzhou 451191, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2012年 / 21卷 / 06期
关键词：
Ceramic material; Thermal barrier coatings; Thermal conductivity; Phonon scattering; THERMOPHYSICAL PROPERTIES; OXIDES; EXPANSION;
D O I：
10.1007/s11665-011-9950-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dy2Ce2O7 ceramic material was prepared by solid reaction method at 1600 A degrees C for 10 h. The phase composition, microstructure, and thermal conductivity of this material were investigated. XRD results reveal that single-phase Dy2Ce2O7 with fluorite structure was synthesized successfully. Microstructure of Dy2Ce2O7 was dense and no other unreacted oxides or interphase existed in the interfaces between grains. Because of phonon scattering by oxygen vacancies and difference in atomic mass between substitutional atoms and host atoms, thermal conductivity of Dy2Ce2O7 is lower than that of 8YSZ, which implies that this ceramic can be used as novel candidate materials for thermal barrier coatings in the future.
引用
收藏
页码：1046 / 1050
页数：5
相关论文
共 26 条
  • [1] Effects of doping on thermal conductivity of pyrochlore oxides for advanced thermal barrier coatings
    Bansal, Narottam P.
    Zhu, Dongming
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 459 (1-2): : 192 - 195
  • [2] Lanthanum-cerium oxide as a thermal barrier-coating material for high-temperature applications
    Cao, XQ
    Vassen, R
    Fischer, W
    Tietz, F
    Jungen, W
    Stöver, D
    [J]. ADVANCED MATERIALS, 2003, 15 (17) : 1438 - 1442
  • [3] Thermophysical properties of lanthanum zirconate coating prepared by plasma spraying and the influence of post-annealing
    Chen, Hongfei
    Gao, Yanfeng
    Tao, Shunyan
    Liu, Yun
    Luo, Hongjie
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 486 (1-2) : 391 - 399
  • [4] Neodymium-cerium oxide as new thermal barrier coating material
    Dai, Hui
    Zhong, Xinghua
    Li, Jiayan
    Meng, Jian
    Cao, Xueqiang
    [J]. SURFACE & COATINGS TECHNOLOGY, 2006, 201 (06) : 2527 - 2533
  • [5] Thermal stability of double-ceramic-layer thermal barrier coatings with various coating thickness
    Dai, Hui
    Zhong, Xinghua
    Li, Hayan
    Zhang, Yanfei
    Meng, Jian
    Cao, Xueqiang
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 433 (1-2): : 1 - 7
  • [6] Progress in coatings for gas turbine airfoils
    Goward, GW
    [J]. SURFACE & COATINGS TECHNOLOGY, 1998, 108 (1-3) : 73 - 79
  • [7] Thermal conductivity and thermal expansion coefficients of the lanthanum rare-earth-element zirconate system
    Lehmann, H
    Pitzer, D
    Pracht, G
    Vassen, R
    Stöver, D
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (08) : 1338 - 1344
  • [8] Leitner J, 2003, THERMOCHIM ACTA, V395, P27
  • [9] Lanthanum zirconate ceramic toughened by BaTiO3 secondary phase
    Li, J. Y.
    Dai, H.
    Zhong, X. H.
    Zhang, Y. F.
    Ma, X. F.
    Meng, J.
    Cao, X. Q.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 452 (02) : 406 - 409
  • [10] Preparation and thermophysical properties of (Nd x Gd1-x )2Zr2O7 ceramics
    Liu, Zhan-Guo
    Ouyang, Jia-Hu
    Zhou, Yu
    [J]. JOURNAL OF MATERIALS SCIENCE, 2008, 43 (10) : 3596 - 3603
123