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Effect of the core-shell structure powders on the microstructure and thermal conduction property of YSZ/Cu composite coatings.
- Source :
-
Surface & Coatings Technology . Oct2021, Vol. 424, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- The microstructure of thermal spray 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. • To reveal thermal conduction anisotropy, YSZ@Cu core-shell structure powder was used to fabricate composite coatings by APS. • The YSZ@Cu coating has an alternate-layered structure including horizontal thermal conduction and vertical thermal isolation layer. • Based on experimental analysis, the novel YSZ@Cu coating make surface temperature difference reduce by approximately 37%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02578972
- Volume :
- 424
- Database :
- Academic Search Index
- Journal :
- Surface & Coatings Technology
- Publication Type :
- Academic Journal
- Accession number :
- 152629566
- Full Text :
- https://doi.org/10.1016/j.surfcoat.2021.127658