摘要
高温封严涂层应用在航空发动机高压压气机和涡轮等气路封严部位,可以减少转子和静子之间的间隙,提高发动机效率、降低油耗,是当前研究的热点。从金属基高温封严涂层和陶瓷基高温封严涂层两个方面分别进行分析,总结国内、外高温封严涂层的发展及研究现状,指出我国在陶瓷基高温封严涂层研究和应用领域存在的差距;分析YSZ陶瓷基封严涂层失效的主要原因,并且分别从陶瓷涂层显微形态优化和显微组织优化两个角度进行展开,分析当前提高YSZ陶瓷基封严涂层热循环寿命的研究成果和存在的问题;探索了基于贝壳仿生结构设计和晶须增韧机理分别对涂层显微形态优化和显微组织优化的新思路,以及新技术面临的问题。在此基础上,展望了新型陶瓷基高温封严涂层的发展方向。
High temperature sealing coating is applied to the air seal parts of high pressure compressor and turbine of aeroengines,which can reduce the clearance between rotor and stator,improve engine efficiency and reduce fuel consumption.The development and research status of metal-based and ceramic-based high-temperature sealing coating are analyzed,and the gap between China and abroad of ceramic-based high temperature sealing coating is given out.The main failure reasons of YSZ ceramic-base sealing coating are analyzed,and the research results and problems in improving thermal cycle life of the coating are analyzed from the perspectives of micromorphology optimization and microstructure optimization,respectively.Based on the bionic structure design of shell and whisker toughening mechanism,new ideas of optimizing the micromorphology and microstructure of the coating,and the problems faced by new technologies are explored.Finally,the development directions of new ceramic-base high temperature sealing coating are prospected.
作者
程涛涛
王志平
戴士杰
丁坤英
马祥
CHENG Taotao;WANG Zhiping;DAI Shijie;DING Kunying;MA Xiang(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401;Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300;Engine Overhaul Department,AMECO,Beijing 100621)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2021年第10期126-136,147,共12页
Journal of Mechanical Engineering
基金
中央高校基本科研业务费(3122020057)
天津市教委自然科学研究(2020KJ030)资助项目。
关键词
高温封严涂层
显微形态
显微组织
仿生结构设计
晶须增韧
high temperature sealing coating
micromorphology
microstructure
bionic structural design
whisker toughening
