改性MCrAlY涂层的研究进展  

Research Status of Modified MCrAlY Coatings

作　　者：孙华键 郭德林 李如庆 侯良朋 杨明辉 孙金钊 殷凤仕[1] SUN Huajian;GUO Delin;LI Ruqing;HOU Liangpeng;YANG Minghui;SUN Jinzhao;YIN Fengshi(School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255000,Shandong,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000 [2]山东理工大学化学化工学院,山东淄博255000

出　　处：《材料导报》2024年第7期179-188,共10页Materials Reports

基　　金：山东自然科学基金(ZR20191112010)。

摘　　要：热防护涂层可以有效阻止高温、高压、高速等严苛环境造成的高温氧化、疲劳失效等问题,被广泛用于航空发动机与燃气轮机热端部件的热防护。在热防护涂层体系中,MCrAlY(M代表Co、Ni或两者的组合)涂层作为抗氧化、抗热腐蚀覆盖层以及热障涂层系统中的粘结层,以其优异的抗热腐蚀性能及灵活的选择性得到广泛应用。为进一步提高MCrAlY涂层热稳定性及延长其使用寿命,满足使用温度超过1000℃的要求,众多制备与改性方法应运而生。为进一步拓展MCrAlY涂层的应用,本文系统总结了MCrAlY涂层的发展历程及制备方法,重点梳理了掺杂元素、氧化物分散强化、纳米涂层、真空热处理、激光表面处理及梯度结构设计等改性方法,并在此基础上对MCrAlY涂层的未来发展方向进行了展望。Thermally protective coatings can effectively prevent fatigue failure caused by high-temperature oxidation and harsh environments such as high temperature,high pressure and high speed,and are widely used for thermal protection of aero-engine and gas turbine hot end components.Among the thermal protection coating systems,MCrAlY coatings are widely used as antioxidant and thermal corrosion-resistant cover layers as well as binder layers for thermal barrier coating systems due to their excellent thermal corrosion resistance and flexible selectivity.To further improve the thermal stability and service life of MCrAlY coatings to meet the requirements of operating temperatures above 1000℃,several preparation and modification methods have emerged.They mainly include vacuum pretreatment,nano-coating,elemental doping,oxide dispersion strengthening,laser surface treatment,gradient coating,etc.These modifications are used to improve the structural refinement,grain boundary purification and adhesion of Al_(2)O_(3)oxides,thereby increasing the thermally stable behaviour and service life of MCrAlY coatings.There are many ways to improve MCrAlY coatings,but they are not systematically summarised and presented.Based on this.This paper clarifies the application of MCrAlY coatings and the current standard preparation methods,focuses on sorting out the ways to improve the performance of MCrAlY coa-tings,introduces their advantages and disadvantages,and provides a reference basis for further expanding the application of MCrAlY coatings.

关 键 词：MCRALY 制备技术 改善方法 微观组织 抗高温氧化性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]