Effects of pre-service heat treatments on microstructure and properties of atmospheric-plasma-sprayed Yb2SiO5 environmental barrier coating

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-02-01 DOI:10.1016/j.surfcoat.2025.131760

Wenxiu Dong , Jieyan Yuan , Jingbo Duan , Xiaoye Hu , Xian Dang , Kewei Li , Xinyang Li , Zhulin Huang , Yue Li

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Abstract

In this work, Yb₂SiO₅ coating was plasma sprayed, and the phase evolutions (such as recrystallization and isostructural monosilicate transformation) as well as the microstructural modification in this as-sprayed amorphous coating has been explored during thermal aging process. Results show that a pre-service heat treatment at temperatures ≥1200 °C is necessary to complete the transformations and to recover the mechanical and thermophysical properties of Yb₂SiO₅ coating. Furthermore, the water vapor corrosion behaviors of as-sprayed and heat-treated Yb₂SiO₅ coatings were evaluated at 1300 °C for 50–200 h. The Yb₂O₃ phase in coating preferably volatilizes, leaving a relatively dense reacted layer composed of Yb₂SiO₅ on the surface of all corroded Yb₂SiO₅ coatings. However, it is found although promoting crystallization and performance recovery of Yb₂SiO₅ coating, heat treatment exacerbates the steam corrosion to some extent by facilitating water vapor penetration along the enlarged and widened vertical microcracks.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.