Enhanced anti-deliquescent property and ultralow thermal conductivity of magnetoplumbite-type LnMeAl11 O19 materials for thermal barrier coating

2017 ◽  
Vol 101 (3) ◽  
pp. 1095-1104 ◽  
Author(s):  
Chang-An Wang ◽  
Haoran Lu ◽  
Zeya Huang ◽  
Huimin Xie
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Barrier Coating

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.

scholarly journals High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials

2019 ◽  
Vol 8 (4) ◽  
pp. 576-582 ◽  
Author(s):  
Fei Li ◽  
Lin Zhou ◽  
Ji-Xuan Liu ◽  
Yongcheng Liang ◽  
Guo-Jun Zhang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Coating Materials ◽  
Low Thermal Conductivity ◽  
High Entropy ◽  
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

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

Thermal Conductivity and Specific Heat Capacity of Different Compositions of Yttria Stabilized Zirconia-Nickel Mixtures

2015 ◽  
Vol 1119 ◽  
pp. 783-788 ◽  
Author(s):  
Muhammad Rabiu Abbas ◽  
Alias Mohd Noor ◽  
Srithar Rajoo ◽  
Norhayati Ahmad ◽  
Uday M. Basheer ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Specific Heat ◽  
Thermal Barrier Coating ◽  
Specific Heat Capacity ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Stabilized Zirconia ◽  
Percentage Composition ◽  
Barrier Coating

Ceramic-metal composites also known as functionally gradient materials (FGM) are composite materials which are fabricated in order to have a gradual variation of constituent materials’ thermal and mechanical properties so as to have a smooth variation of the material properties in order to improve the overall performance and reduce the thermal expansion mismatch between ceramic and metal. The objective of the study is to determine the thermal properties of various percentage composition of Yttria stabilized zirconia-Nickel mixtures for application as thermal barrier coating materials in automotive turbocharger turbine volute casing. Specific heat capacity of different percentage composition of ceramic-metal powder composite were determined using DSC822 differential scanning calorimeter (Mettle Tolodo, Switzerland) at temperature ranges between 303K to 873K. While the thermal conductivity of the different percentage composition of ceramic-metal composite structures were determined using P5687 Cussons thermal conductivity apparatus (Manchester, UK) which uses one-dimensional steady-state heat conduction principle. The results have indicated that the specific heat capacity of the FGM increases sharply with an increase in temperature while the thermal conductivity of the FGM decreases with an increase in temperature. These results strongly agree with the theoretical and experimental values as well as the rule of mixtures obtainable in literature, which indicated the suitability of these FGM materials for thermal barrier coating applications.

Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications

2004 ◽  
Vol 85 (12) ◽  
pp. 3031-3035 ◽  
Author(s):  
Jie Wu ◽  
Xuezheng Wei ◽  
Nitin P. Padture ◽  
Paul G. Klemens ◽  
Maurice Gell ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Rare Earth ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Low Thermal Conductivity ◽  
Barrier Coating
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