通过凝固拉拔调整环境屏障涂层的抗氧化性：Si/Si- mosi2粘结涂层的研究

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-09-21 DOI:10.1016/j.surfcoat.2025.132719

Na Zeng, Yulong Wang, Kairui Zhao, Gui Li, Jiayan Li

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引用次数: 0

摘要

为了制备致密性好、无气孔、裂纹等缺陷的Si涂层，提出了采用凝固拉拔法制备Si涂层的方法，制备了结构致密的Si和Si- mosi2涂层。在1400℃的静态氧化过程中，MoSi2表现出复杂的氧化反应。由于涂层表面氧分压的变化，MoSi2被氧化为Mo5Si3、MoO3和SiO2。与Si涂层相比，在Si-MoSi2涂层中加入MoSi2可以有效地减缓热生长氧化物（TGO）表面裂纹的扩展和扩展。在1300℃的氧腐蚀过程中，Si-MoSi2复合涂层的昆虫状物质可以有效地密封裂纹和孔隙，隔离环境腐蚀，并在TGO/键合层界面富集MoSi2形成团簇。这降低了Si/TGO的接触面积比，阻碍了氧的进一步渗透，提高了抗氧化性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Tailoring oxidation resistance of environmental barrier coatings via solidification pulling: A study on Si/Si-MoSi2 bond coatings

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Tailoring oxidation resistance of environmental barrier coatings via solidification pulling: A study on Si/Si-MoSi2 bond coatings

In order to develop Si coatings with good compactness and no defects such as pores and cracks, a method of preparing Si coatings by solidification pulling method was proposed, and Si and Si-MoSi₂ coatings with dense structures were prepared. During the static oxidation process at 1400 °C, MoSi₂ exhibited complex oxidation reactions. Due to the change of oxygen partial pressure on the coating surface, MoSi₂ was oxidized to Mo₅Si₃, MoO₃ and SiO₂. Comparison with the Si coating, it is observed that the inclusion of MoSi₂ in the Si-MoSi₂ coating can effectively mitigate the propagation and extension of cracks on the surface of thermally grown oxide (TGO). During the oxygen corrosion process at 1300 °C, the insect-like substance of the Si-MoSi₂ composite coating can effectively seal cracks and pores, isolate environmental corrosion, and enrich MoSi₂ at the TGO/bonding layer interface to form clusters. This reduces the contact area ratio of Si/TGO, impedes further oxygen penetration, and enhances oxidation resistance.

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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.