Preparation, microstructure evolution, and crystallization behavior of eutectic YAG/Al2O3 ceramic coating deposited by atmospheric plasma spraying

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2024-11-23 DOI:10.1016/j.surfcoat.2024.131571

Jie Li , Cuihong Li , Yang Cui , Tiefeng Du , Zhixin Luo , Cui Zhou , Haoyu Wang , Luchao Sun , Jingyang Wang

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Abstract

In this study, eutectic Y₃Al₅O₁₂/Al₂O₃ coatings with alternating YAG and Al₂O₃ phases are successfully prepared using atmospheric plasma spray (APS) technique. Through subjecting the coatings to heat treatments within temperatures ranging from 1000 °C to 1500 °C, it becomes possible to tailor the microstructures of the coatings, including phase distribution, porosity level, grain sizes, and interphase spacing. Furthermore, an investigation into the crystallization behavior of YAG and Al₂O₃ phases, as well as the formation mechanism of eutectic-like microstructure in YAG/Al₂O₃ coatings, reveals that YAG phases undergo primary crystallization from the amorphous phase, followed by secondary crystallization of Al₂O₃ phases between YAG crystals. This work provides insights into understanding the relationship between heat treatment temperatures and coating morphologies, as well as elucidates the formation mechanism of eutectic-like microstructure, thereby guiding the controlled preparation of YAG/Al₂O₃ coatings via APS technique.

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常压等离子喷涂YAG/Al2O3共晶陶瓷涂层的制备、微观结构演变及结晶行为

在本研究中，采用常压等离子喷涂（APS）技术成功制备了YAG和Al2O3相间的共晶Y3Al5O12/Al2O3涂层。通过在1000°C到1500°C的温度范围内对涂层进行热处理，可以定制涂层的微观结构，包括相分布、孔隙度、晶粒尺寸和相间距。此外，对YAG和Al2O3相的结晶行为以及YAG/Al2O3涂层中共晶组织的形成机制进行了研究，发现YAG相在非晶相中发生一次结晶，随后在YAG晶体之间发生Al2O3相的二次结晶。本研究有助于理解热处理温度与涂层形貌之间的关系，并阐明了类共晶微观结构的形成机制，从而指导通过APS技术控制制备YAG/Al2O3涂层。

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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.