The glass-like thermal conductivity in ZrO2-Dy3TaO7 ceramic for promising thermal barrier coating application

2018 ◽  
Vol 112 (13) ◽  
pp. 131903 ◽  
Author(s):  
Peng Wu ◽  
Ming Yu Hu ◽  
Xiao Yu Chong ◽  
Jing Feng
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Coating Application ◽  
Barrier Coating

Phase Stability and Thermal Conductivity of La2O3, Y2O3 Stabilized ZrO2 Ceramic for Thermal Barrier Coating Application

2014 ◽  
Vol 1033-1034 ◽  
pp. 907-911 ◽  
Author(s):  
Huai Fei Liu ◽  
Xiang Xiong ◽  
Ya Lei Wang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier Coating ◽  
Phase Stability ◽  
Thermal Barrier ◽  
Coating Application ◽  
Barrier Coating ◽  
Heat Treated ◽  
Tbc Systems ◽  
Thermal Physical Properties ◽  
Co Doped

Rare earth oxides co-doped zirconia has been developed for application in thermal barrier coating (TBC) systems to promote the performance and durability. In this paper, the phase stability and thermal physical properties of 1mol.%La2O3, 4.5mol.%Y2O3stabilized ZrO2(LaYSZ) were investigated. After 100 h heat treated at 1400°C, the content of monoclinic phase in LaYSZ was 2.32 mol%, which is lower than that in YSZ (46.9 mol%). Result indicates that the LaYSZ has better phase stability and lower thermal conductivity than YSZ. The LaYSZ system can be explored as the candidate material as ceramic layer in TBC.

scholarly journals Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

Coatings ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 253 ◽  
Author(s):  
Qi Wang ◽  
Lei Guo ◽  
Zheng Yan ◽  
Fuxing Ye
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Phase Composition ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Promising Candidate ◽  
Dopant Content ◽  
Barrier Coating ◽  
M Phase ◽  
T Phase

TiO2 was doped into Er2O3-stabilized ZrO2 (ErSZ) to obtain desirable properties for thermal barrier coating (TBC) applications. The phase composition, thermal conductivity, and mechanical properties of TiO2-doped ErSZ were investigated. ErSZ had a non-transformable metastable tetragonal (t′) phase, the compound with 5 mol % TiO2 consisted of t′ and cubic (c) phases, while 10 mol % TiO2 doped ErSZ had t′, c, and about 3.5 mol % monoclinic (m) phases. Higher TiO2 doping contents caused more m phase, and the compounds were composed of t′ and m phases. When the dopant content was below 10 mol %, TiO2 doping could decrease the thermal conductivity and enhance the toughness of the compounds. At higher doping levels, the compounds exhibited an increased thermal conductivity and a reduction in the toughness, mainly attribable to the formation of the undesirable m phase. Hence, 10 mol % TiO2-doped ErSZ could be a promising candidate for TBC applications.

Towards thermal barrier coating application for rare earth silicates RE2SiO5 (RE= La, Nd, Sm, Eu, and Gd)

2019 ◽  
Vol 39 (4) ◽  
pp. 1463-1476 ◽  
Author(s):  
Zhilin Tian ◽  
Jie Zhang ◽  
Tianyin Zhang ◽  
Xiaomin Ren ◽  
Wanpeng Hu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Coating Application ◽  
Barrier Coating

Sintering Behavior of Plasma-Sprayed Sm2Zr2O7 Coating

2010 ◽  
Author(s):  
Jianhua Yu ◽  
Huayu Zhao ◽  
Shunyan Tao ◽  
Xiaming Zhou ◽  
Chuanxian Ding
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
High Temperature ◽  
Thermal Expansion Coefficient ◽  
Thermal Barrier Coating ◽  
Expansion Coefficient ◽  
Sintering Behavior ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Plasma Sprayed

Plasma-sprayed thermal barrier coating (TBC) systems are widely used in gas turbine blades to increase turbine entry temperature (TET) and better efficiency. Yttria stabilized zirconia (YSZ) has been the conventional thermal barrier coating material because of its low thermal conductivity, relative high thermal expansion coefficient and good corrosion resistance. However the YSZ coatings can hardly fulfill the harsh requirements in future for higher reliability and the lower thermal conductivity at higher temperatures. Among the interesting TBC candidates, materials with pyrochlore structure show promising thermo-physical properties for use at temperatures exceeding 1200 °C. Sm2Zr2O7 bulk material does not only have high temperature stability, sintering resistance but also lower thermal conductivity and higher thermal expansion coefficient. The sintering characteristics of ceramic thermal barrier coatings under high temperature conditions are complex phenomena. In this paper, samarium zirconate (Sm2Zr2O7, SZ) powder and coatings were prepared by solid state reaction and atmosphere plasma spraying process, respectively. The microstructure development of coatings derived from sintering after heat-treated at 1200–1500 °C for 50 h have been investigated. The microstructure was examined by scanning electron microscopy (SEM) and the grain growth was analyzed in this paper as well.

Thermal Conductivity of a Zirconia Thermal Barrier Coating

1998 ◽  
Vol 7 (1) ◽  
pp. 43-46 ◽  
Author(s):  
A.J. Slifka ◽  
B.J. Filla ◽  
J.M. Phelps ◽  
G. Bancke ◽  
C.C. Berndt
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Barrier Coating
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