Interaction of nanostructured Lu2Si2O7/Lu2SiO5 double-ceramic layer environmental barrier coatings with CMAS

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2025-04-15 Epub Date: 2025-03-01 DOI:10.1016/j.surfcoat.2025.131994

Donghui Guo, Runze Jin, Baolu Shi, Xinlei Jia, Shun Wang, Baosheng Xu

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Abstract

Silicate is considered a promising material for environmental barrier coatings on hot-section components of aircraft engines. However, the interaction of lutetium silicate coating in the molten calcium‑magnesium-aluminosilicate exposure has not been reported yet. In this study, the interaction of nanostructured Lu₂Si₂O₇/Lu₂SiO₅ environmental barrier coatings (EBCs) with CMAS was systematically investigated at 1300–1400 °C for 25–50 h aiming to clarify the corrosion mechanism of the coatings. Results indicated that the Lu₂Si₂O₇/Lu₂SiO₅ coatings remained intact and the molten CMAS did not penetrate the Lu₂SiO₅ layer after corroded at 1400 °C for 50 h. In addition, the recession layer and TGO layer thicknesses of the coatings after corroded at 1400 °C for 50 h were 82.5 μm and 2.27 μm, respectively. The CMAS corrosion resistance of nanostructured Lu₂Si₂O₇/Lu₂SiO₅ coating is superior to that of ytterbium silicate coatings. The results of this work highlight that the Lu₂Si₂O₇/Lu₂SiO₅ coatings with significantly enhanced CMAS resistance performance might be suitable for advanced EBCs applications.

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纳米结构Lu2Si2O7/Lu2SiO5双陶瓷层环境屏障涂层与CMAS的相互作用

硅酸盐被认为是一种很有前途的航空发动机热截面部件环境屏障涂层材料。然而，硅酸镥涂层在钙镁铝熔融暴露中的相互作用尚未见报道。在本研究中，系统研究了纳米结构的Lu2Si2O7/Lu2SiO5环境屏障涂层（EBCs）与CMAS的相互作用，在1300-1400°C下，持续25-50 h，旨在阐明涂层的腐蚀机理。结果表明，在1400℃腐蚀50 h后，Lu2Si2O7/Lu2SiO5涂层保持完整，熔融CMAS未穿透Lu2SiO5涂层，涂层在1400℃腐蚀50 h后的衰退层和TGO层厚度分别为82.5 μm和2.27 μm。纳米结构的Lu2Si2O7/Lu2SiO5涂层的抗CMAS腐蚀性能优于硅酸钇涂层。研究结果表明，具有显著增强的抗CMAS性能的Lu2Si2O7/Lu2SiO5涂层可能适用于高级EBCs应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.