Phase Structure Evolution and Thermo-Physical Properties of Nonstoichiometry Nd2-xZr2+xO7+x/2 Pyrochlore Ceramics

被引：59
作者：
Guo, Lei [1 ,2 ]
Zhang, Yu [1 ,2 ]
Ye, Fuxing [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2015年 / 98卷 / 03期
关键词：
THERMOPHYSICAL PROPERTIES; MECHANICAL-PROPERTIES; RAMAN-SPECTROSCOPY; CONDUCTIVITY; STABILITY; OXIDES; DISORDER; COATINGS; GD; SM;
D O I：
10.1111/jace.13374
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nonstoichiometry pyrochlore composites of Nd2-xZr2+xO7+x/2 (x=0, 0.1, 0.2) were synthesized by chemical-coprecipitation and calcination method. The phase structure evolution and thermo-physical properties of Nd2-xZr2+xO7+x/2 were investigated. Structural analysis by Raman spectroscopy showed that Nd2-xZr2+xO7+x/2 underwent an ordering degree decrease and a lattice distortion increase with increasing x value. Nd1.9Zr2.1O7.05 and Nd1.8Zr2.2O7.1 exhibited lower thermal conductivities than Nd2Zr2O7, which might be related to the lower ordering degree and the enhanced phonon scattering due to lattice distortion. As ZrO2 content increasing, the thermal expansion coefficients of Nd2-xZr2+xO7+x/2 increased, which possibly arised from the decreased crystal energy due to reduced ordering degree.
引用
收藏
页码：1013 / 1018
页数：6
相关论文
共 43 条
  • [1] Berman R., 1976, THERMAL CONDUCTION S, P45
  • [2] Thermal conductivity of (Er1-xYx)2Ti2O7 pyrochlore oxide solid solutions
    Bryan, Craig
    Whitman, Catherine A.
    Johnson, Michel B.
    Niven, John F.
    Murray, Patrick
    Bourque, Alex
    Dabkowska, Hanna A.
    Gaulin, Bruce D.
    White, Mary Anne
    [J]. PHYSICAL REVIEW B, 2012, 86 (05):
  • [3] Ceramic materials for thermal barrier coatings
    Cao, XQ
    Vassen, R
    Stoever, D
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (01) : 1 - 10
  • [4] A sintering model for plasma-sprayed zirconia TBCs. Part I: Free-standing coatings
    Cipitria, A.
    Golosnoy, I. O.
    Clyne, T. W.
    [J]. ACTA MATERIALIA, 2009, 57 (04) : 980 - 992
  • [5] Thermal barrier coating materials
    Clarke, David R.
    Phillpot, Simon R.
    [J]. MATERIALS TODAY, 2005, 8 (06) : 22 - 29
  • [6] Materials selection guidelines for low thermal conductivity thermal barrier coatings
    Clarke, DR
    [J]. SURFACE & COATINGS TECHNOLOGY, 2003, 163 : 67 - 74
  • [7] The influence of oxides on the performance of advanced gas turbines
    Evans, A. G.
    Clarke, D. R.
    Levi, C. G.
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2008, 28 (07) : 1405 - 1419
  • [8] Glerup M, 2001, J SOLID STATE CHEM, V160, P25, DOI [10.1006/jssc.2000.9142, 10.1006/jssc.2001.9142]
  • [9] Progress in coatings for gas turbine airfoils
    Goward, GW
    [J]. SURFACE & COATINGS TECHNOLOGY, 1998, 108 (1-3) : 73 - 79
  • [10] Thermophysical properties of Yb2O3 doped Gd2Zr2O7 and thermal cycling durability of (Gd0.9Yb0.1)2Zr2O7/YSZ thermal barrier coatings
    Guo, Lei
    Guo, Hongbo
    Peng, Hui
    Gong, Shengkai
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2014, 34 (05) : 1255 - 1263
12345