Porous Yb2Si2O7 coating: A new-type high-temperature-resistant abradable seal coating

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS International Journal of Applied Ceramic Technology Pub Date : 2024-07-01 DOI:10.1111/ijac.14843

Mengjun Xu, Zhixin Luo, Xiaoyang Hou, Haoyu Wang, Zhen Wu, Lu Wang, Jingyang Wang

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Abstract

Traditional abradable seal coatings (ASCs) face huge challenges for the requirements of next-generation aero engines due to high inlet temperature (>1300°C) and non-matched coefficients of thermal expansion for SiC based composites. Herein, a novel Yb₂Si₂O₇ seal coating was developed to meet the demands of high-temperature resistance and match the coefficient of thermal expansion with SiC. The prepared Yb₂Si₂O₇ seal coating has excellent properties, including high porosity of 35.5%–23.3%, moderate hardness of 77.9–82.5 HR15Y, and high bond strength of 7.8–9.0 MPa. Adjusting spray current could effectively control the thickness, porosity, and hardness of the coating. More importantly, the coating also has good erosion resistance. Our results show that the fabricated porous Yb₂Si₂O₇ coating would have promising applications in the field of high-temperature ASCs.

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多孔 Yb2Si2O7 涂层：新型耐高温耐磨密封涂层

由于进气温度高（1300°C）以及碳化硅基复合材料的热膨胀系数不匹配，传统的可研磨密封涂层（ASC）在满足下一代航空发动机的要求方面面临巨大挑战。为了满足耐高温的要求，并与碳化硅的热膨胀系数相匹配，我们开发了一种新型的 Yb2Si2O7 密封涂层。制备的 Yb2Si2O7 密封涂层具有优异的性能，包括 35.5%-23.3% 的高孔隙率、77.9-82.5 HR15Y 的中等硬度和 7.8-9.0 MPa 的高结合强度。调节喷涂电流可有效控制涂层的厚度、孔隙率和硬度。更重要的是，涂层还具有良好的抗侵蚀性。我们的研究结果表明，所制备的多孔 Yb2Si2O7 涂层在高温 ASC 领域具有广阔的应用前景。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;