Investigation on the phase stability and thermal conductivity of Sc2O3, Y2O3 co-doped ZrO2 coatings

2015 ◽  
pp. 123-127
Author(s):  
H Liu ◽  
X Xiong ◽  
Y Wang ◽  
X Chen
Keyword(s):  
Thermal Conductivity ◽  
Phase Stability ◽  
Co Doped

scholarly journals Phase stability and thermal conductivity of ytterbia and yttria co-doped zirconia

2013 ◽  
Vol 23 (4) ◽  
pp. 440-445 ◽  
Author(s):  
Leilei Sun ◽  
Hongbo Guo ◽  
Hui Peng ◽  
Shengkai Gong ◽  
Huibin Xu
Keyword(s):  
Thermal Conductivity ◽  
Phase Stability ◽  
Co Doped

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 Simultaneously Enhanced Thermal Conductivity and Breakdown Performance of Micro/Nano-BN Co-Doped Epoxy Composites

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3521
Author(s):  
Chuang Zhang ◽  
Jiao Xiang ◽  
Shihang Wang ◽  
Zhimin Yan ◽  
Zhuolin Cheng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Frequency ◽  
Breakdown Strength ◽  
Epoxy Composites ◽  
Endurance Time ◽  
Insulating Materials ◽  
Power Frequency ◽  
High Frequency Devices ◽  
Co Doped ◽  
Enhanced Thermal Conductivity

Micro/nano- BN co-doped epoxy composites were prepared and their thermal conductivity, breakdown strength at power frequency and voltage endurance time under high frequency bipolar square wave voltage were investigated. The thermal conductivity and breakdown performance were enhanced simultaneously in the composite with a loading concentration of 20 wt% BN at a micro/nano proportion of 95/5. The breakdown strength of 132 kV/mm at power frequency, the thermal conductivity of 0.81 W∙m−1∙K−1 and voltage endurance time of 166 s were obtained in the composites, which were approximately 28%, 286% and 349% higher than that of pristine epoxy resin. It is proposed that thermal conductive pathways are mainly constructed by micro-BN, leading to improved thermal conductivity and voltage endurance time. A model was introduced to illustrate the enhancement of the breakdown strength. The epoxy composites with high thermal conductivity and excellent breakdown performance could be feasible for insulating materials in high-frequency devices.

Phase stability of Y + Gd Co-Doped Zirconia

2003 ◽  
Vol 94 (3) ◽  
pp. 163-170 ◽  
Author(s):  
Noemí R. Rebollo ◽  
Olga Fabrichnaya ◽  
Carlos G. Levi
Keyword(s):  
Phase Stability ◽  
Co Doped
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