|
| Abstract No.: |
|
Scheduled at:
|
Thursday, May 05, 2022, Hall G1 4:20 PM
Ceramic Coatings
|
|
| Title: |
Effect of the core-shell structure powders on the microstructure and thermal conduction property of YSZ/Cu composite coatings
|
|
| Authors: |
Jinpeng Zhu* / Zhengzhou University, P.R. China
Kaijun Yang / Zhengzhou University, China
Hailong Wang/ Zhengzhou University , China
|
|
| Abstract: |
The microstructure of as-sprayed powders plays a significant role in the application performance of thermal protection coatings deposited by air plasma spraying. Based on the design of the spray powder structure, the YSZ@Cu core-shell structure powders have the potential to be a thermal conduction anisotropy material for thermal protection coating, owing to the special alternate-layered structure formed during plasma spraying. To study the mechanism of the thermal conduction anisotropy of YSZ/Cu composite coatings, the YSZ coatings, YSZ@Cu coatings and YSZ-Cu coatings were fabricated by YSZ powders, YSZ@Cu core-shell structure powders and YSZ-Cu mechanical mixture powders, respectively. There were YSZ vertical thermal insulation layer and Cu horizontal thermal condition layer in the YSZ@Cu coatings, which provides a structural basis for the realization of thermal conduction anisotropy. Compared with the YSZ-Cu coatings, the temperature difference between the back-surface center area and the edge area of the YSZ@Cu coatings is significantly reduced by approximately 37%, which is attributed to the synergistic effect of alternate-layered comprising the YSZ layer and the high thermal conductivity Cu layer. YSZ@Cu coatings can effectively prevent the rapid rise in local temperature by the analysis of finite-element simulation, which is beneficial for prolonging the service life of the thermal protection coating in a non-uniform temperature field.
|
|