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

SURFACE & COATINGS TECHNOLOGY

卷:386

Article

Zhao, Yongli^1,2  Wen, Juhong¹  Peyraut, Francois²  Planche, Marie-Pierre²  Misra, Shantanu³  Lenoir, Bertrand³  Ilavsky, Jan⁴  Liao, Hanlin²  Montavon, Ghislain² 

[1] Shanghai Univ Engn Sci, Sch Mech & Automot Engn, Shanghai 201620, Peoples R China

[2] Univ Bourgogne Franche Comte, UTBM, CNRS, ICB UMR 6303, F-90010 Belfort, France

[3] Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, 2 Alee Andre Guinier Campus ARTEM,BP 50840, F-54011 Nancy, France

[4] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA

关键词: Thermal barrier coating;    Suspension plasma spray;    YSZ coating;    Porous architecture;    Thermal property;   

DOI  :  10.1016/j.surfcoat.2020.125462

来源: Elsevier

【 摘 要 】

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 Xray 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.

【 授权许可】

Free