| 摘要: |
| 硅基非氧化物陶瓷材料因其质量轻、强度高、韧性大等优点和其上的环境障涂层,广泛用于民用或军用飞机发动机的热端部件,但目前所用的传统环境障涂层保护效果并不理想。 因此对新发展的稀土硅酸盐环境障涂层进行深入研究,以使其能广泛用于高推重比发动机上具有重要意义。 稀土硅酸盐环境障涂层相较于传统环境障涂层,具有更好的隔热性、与基体更匹配的热膨胀系数(二硅酸镱)及优异的抗腐蚀性能,如稀土硅酸镱盐具有良好的抗水氧和抗熔盐腐蚀性能,这些性能能够有效提高硅基陶瓷及涂层在发动机恶劣环境下的使用寿命,目前已成为飞机的首选防护涂层材料,从而成为环境障涂层材料领域研究的热点。 从稀土硅酸盐环境涂层的主要应用研究背景、发展历程、制备方法、涂层性能、失效机理等方面系统阐述其各种特点,提出目前稀土硅酸盐环境障涂层易失效的多种原因,以及工艺制备和性能模拟测试方面的不足之处,为未来的涂层改进和研究发展指明了方向。 |
| 关键词: 稀土硅酸盐 环境障涂层 高温稳定性 耐腐蚀性 |
| DOI：10.11933/j.issn.1007-9289.20210603001 |
| 分类号:TG174 |
| 基金项目:国家科技部重大专项资助项目(2017-ⅤⅠ-0020-0093) |
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| Review of Rare Earth Silicate Environmental Barrier Coatings |
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WANG Jianing1, WANG Chaohui1, WANG You2, LI Guangshu1, WANG Chunqi1, RONG Zhiyi1, LIU Huinan1
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1.College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006 , China;2.College of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 , China
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| Abstract: |
| Although silicon-based non-oxide ceramic materials and their environmental barrier coatings are widely used in the hot end parts of civil and military aircraft engines, the traditional environmental barrier coatings currently used are not ideal for protection. Therefore, it is necessary to study the newly developed rare earth silicate environmental barrier coatings so that they can be widely used in high thrust-to-weight ratio engines. Rare earth silicate environmental barrier coating compared with the traditional environmental barrier coatings, insulating has better stays, and matrix matching of thermal expansion coefficient, such as the silicate ytterbium, and excellent corrosion resistance, such as rare earth silicate ytterbium salt has good resistance to water of oxygen and molten salt corrosion resistance, these performance can effectively increase the silica-based ceramic and coating in the service life of the engine under the bad environment, At present, it has become the first choice of the protective coating material for the aerospace industry engine, so it has become the focus of research in the field of environmental barrier coating materials. From the main application of rare earth silicate coating environment background, properties, preparation methods, failure mechanism and so on system elaborated its various characteristics, this paper puts forward the current rare earth silicate environment barrier coating easy failure of a variety of reasons and the preparation process and performance simulation testing of deficiency, coating for the future improvement and pointed out the direction of the research and development. |
| Key words: rare earth silicate environmental barrier coating high temperature stability corrosion resistance |
