MCrAlY涂层的研究进展  

Research Progress of MCrAlY Coatings

作　　者：门引妮 李进 卢金文 徐研 郭阳阳 MEN Yinni;LI Jin;LU Jinwen;XU Yan;GUO Yangyang(Xi'an Rarealloys Co.,Ltd.,Xi'an 710016,China)

机构地区：[1]西安瑞鑫科金属材料有限责任公司,西安710016

出　　处：《表面技术》2024年第7期31-39,共9页Surface Technology

基　　金：陕西省2023年度秦创原引用高层次创新创业人才项目(QCYRCXM-2023-020)。

摘　　要：随着发动机的服役温度日益升高,工作环境日益恶劣,涡轮叶片极易在高温环境中氧化,大大降低了叶片的使用寿命。如何在低成本下制备保护性能好的高温防护涂层,是当前国内外研究的重点。MCrAlY包覆涂层可分为NiCrAlY涂层、CoCrAlY涂层和NiCoCrAlY涂层,这3类涂层的抗氧化性能和抗腐蚀性能较好,又有很好的塑韧性和抗热疲劳性能,因此可作为涂层或热障涂层的黏结层材料。综述了涂层中主要元素(Al、Cr、Co、Y)、掺杂合金元素(Ta、Re、Si、Pt)、涂层制备工艺和预处理工艺对MCrAlY涂层性能的研究进展。结果表明,可以通过调节MCrAlY涂层的成分来实现涂层性能的调控。向MCrAlY涂层中掺入Si、Ta和Re等活性元素,可显著提高涂层的抗高温氧化性能,以进一步提高发动机的工作效率和满足高温的工作环境需求。总结了采用细化涂层晶粒、掺杂纳米颗粒和制备梯度复合涂层等方法来提高MCrAlY涂层的抗氧化性能和抗腐蚀性能的研究现状,对MCrAlY涂层的发展趋势进行了展望。With the rapid development of aerospace industry,the service temperature of the engine rises gradually,and the working environment gets worse.Turbine blades are easily oxidized in high temperature environment,which greatly reduces the service life of the blades.How to prepare high temperature protective coating with good protective performance at low cost is the focus of research in China and abroad,which is of great strategic significance to national defense security and national economic development.The work aims to present a comprehensive overview of research progress on MCrAlY coatings,which are widely used to protect substrates against oxidation and corrosion in high temperature environment.MCrAlY coating is subdivided into NiCrAlY coating,CoCrAlY coating and NiCoCrAlY coating.These three kinds of coatings have good oxidation resistance and corrosion resistance,as well as good plastic toughness and thermal fatigue resistance,so they can be used as bonding layer materials for coatings or thermal barrier coatings.The research progress on the properties of MCrAlY coating,such as the main elements(Al,Cr,Co,Y),the addition of alloy elements(Ta,Re,Si,Pt),the coating preparation process and the pretreatment process was reviewed.The results showed that different compositions and structures would affect the performance and application range of the coating.The control of coating properties could be realized by adjusting the composition of MCrAlY coating.The addition of alloy elements such as Si,Ta and Re into the MCrAlY coating could significantly improve the high temperature oxidation resistance of the coating,which was critical for improving the working efficiency of the engine and met the requirements of high temperature working environment.The preparation process and process parameters of the coating would affect its quality and stability.Moreover,various methods were summarized to improve the oxidation resistance and corrosion resistance of MCrAlY coatings,including refining the coating grain size,doping with nan

关 键 词：MCRALY涂层 活性元素 制备工艺 抗氧化性能 抗腐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理]