scholarly journals High-temperature stability of yttria-stabilized zirconia thermal barrier coating on niobium alloy—C-103

2016 ◽  
Vol 39 (1) ◽  
pp. 321-329 ◽  
Author(s):  
S S PANWAR ◽  
T UMASANKAR PATRO ◽  
K BALASUBRAMANIAN ◽  
B VENKATARAMAN
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coating ◽  
Temperature Stability ◽  
Niobium Alloy ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
High Temperature Stability ◽  
Stabilized Zirconia ◽  
Barrier Coating

Finite Element Analysis of Temperature Characteristicon the Pressure Sensor Based on the Shell of Piezo Gauge

2010 ◽  
Vol 156-157 ◽  
pp. 117-122
Author(s):  
Xin E. Li ◽  
Jing Zu ◽  
Peng Xu
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Thermal Barrier Coating ◽  
Temperature Stability ◽  
Chamber Pressure ◽  
Thermal Barrier ◽  
Element Analysis ◽  
Temperature Characteristics ◽  
Barrier Coating ◽  
Novel Method

When the gun chamber pressure is tested, its instantaneous high temperature up to 3000 , Sensor directly touches the high temperature gas. According to this special use environment, A novel method is proposed in this paper: the thermal barrier coating (TBC) is added to protect the sensor against its thermal deformity. And temperature characteristics of the sensor with TBC are analyzed through finite element. finally, its temperature characteristics were experimentally tested. Results show that the thermal barrier coating plaied heat insulation role, temperature stability of the sensor is good.

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.

scholarly journals The Thermal Conductivity of 8 Yttria Stabilized Zirconia and Mullite Thermal Barrier Coating on Medium Carbon Steel Substrate

2019 ◽  
Vol 9 (1) ◽  
pp. 5886-5892
Keyword(s):  
Thermal Conductivity ◽  
Carbon Steel ◽  
Thermal Barrier Coating ◽  
Steel Substrate ◽  
Medium Carbon Steel ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Stabilized Zirconia ◽  
Medium Carbon ◽  
Barrier Coating

Thermal conductivity is one of the main features of a thermal barrier coating (TBC) that is important in making sure that the TBC gives its best functionality to the system. A good TBC has low thermal conductivity, so that the temperature can drop across the coating which allows the system to operate in extremely high temperatures. There are several factors that can influence the thermal conductivity of the TBC such as the type of ceramic material used, the deposition method and the physical features of the TBC itself. For this research, air plasma spray (APS) is used to deposit 8 wt% yttria stabilized zirconia (8YSZ) and mullite on medium carbon steel substrates to study their respective thermal conductivities. The aim here is to develop a heat shield using TBC to protect the electric motor in an electrical turbocompounding system. The characteristics of the deposited TBC such as microstructure, element composition, phases and thermal conductivity are studied. The thermal conductivity is reduced when medium carbon steel substrate deposited with TBC. The thermal conductivity of 8YSZ, mullite and uncoated sample at minute 60 is 0.868 W/mK, 0.903 W/mK and 1.057 W/mK, respectively. Therefore, the deposition of 8YSZ TBC can lower the thermal conductivity of the medium carbon steel heat shield.

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