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RESEARCH PRODUCT

Porous architecture and thermal properties of thermal barrier coatings deposited by suspension plasma spray

Shantanu MisraG. MontavonJan IlavskyYongli ZhaoYongli ZhaoFrançois PeyrautJuhong WenMarie-pierre PlancheBertrand LenoirHanlin Liao

subject

[PHYS]Physics [physics]Materials sciencebusiness.industry02 engineering and technologySurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructureLaser flash analysisSurfaces Coatings and FilmsThermal barrier coating[SPI]Engineering Sciences [physics]020303 mechanical engineering & transports0203 mechanical engineeringThermal insulationNano-Heat transferMaterials ChemistrySuspension plasma sprayComposite material0210 nano-technologyPorositybusinessComputingMilieux_MISCELLANEOUS

description

Abstract Besides the intrinsic low heat transfer capability of material, the thermal insulation property of thermal barrier coatings (TBCs) also relies on their microstructures. For better understanding the relationship between process parameters, porous architecture, and thermal properties of coatings, YSZ coatings were firstly manufactured by suspension plasma spray (SPS). Afterwards their total porosities were characterized by using the technique of X-ray transmission, the nano/submicro pores in those coatings were detected with Ultra-Small Angle X-ray Scattering (USAXS), and the thermal properties of coatings were measured using the laser flash method. The results indicated that: i) the porous architecture of SPS coatings can be tailored by adapting process parameters. ii) increasing total porosity is an effective means for reducing the heat transfer capability of SPS coatings. iii) nano/submicro pores have higher influence sensitivity on thermal properties than that of larger pores. Increasing the content of nano-submicro pores is therefore more effective for improving the thermal insulation property of SPS coatings. The potential of SPS technique for fabricating TBCs was discussed as well.

yearjournalcountryeditionlanguage
2020-02-10Surface and Coatings Technology
https://doi.org/10.1016/j.surfcoat.2020.125462