Evaluation of nano/submicro pores in suspension plasma sprayed YSZ coatings

SURFACE & COATINGS TECHNOLOGY

卷:378

Article

Zhao, Yongli^1,2  Wang, Yan²  Peyraut, Francois²  Liao, Hanlin²  Montavon, Ghislain²  Planche, Marie-Pierre²  Ilavsky, Jan³  Lasalle, Audrey⁴  Allimant, Alain⁴ 

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

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

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

[4] St Gobain CREE, F-84300 Cavaillon, France

关键词: Suspension plasma spray;    Nano-submicro pore;    Multivariate analysis;    YSZ coating;    Predictive model;    USAXS;   

DOI  :  10.1016/j.surfcoat.2019.125001

来源: Elsevier

【 摘 要 】

Nano-submicro pores could considerably influence the coating performances and thus should be properly designed for the intended applications. However, it is challenging to characterize accurately such small pores in coatings. In this study, YSZ coatings were firstly manufactured by suspension plasma spray (SPS) and the nano-submicro pores in as-prepared coatings were investigated using Ultra-small-angle X-ray scattering (USAXS). Afterwards, a multivariate analysis on the effect of five different process parameters was carried out. The two main results showed that: 1) the nano-submicro pores content in coatings has a negative correlation with suspension mass load and powder size, and a positive correlation with spray distance, spray step, and substrate surface roughness; 2) suspension mass load is the main factor affecting the content of nano-submicro pores. Then, a mathematical model for the prediction of nano-submicro pores was developed, and the control of nano-submicro pores content by using the predictive model was presented. Finally, the sintering effect on the evolution of nano-submicro pores was studied in-situ using USAXS as well.

【 授权许可】

Free