Research Progress of Ceramic-based High Temperature Sealing Coating for Aeroengines

doi:10.3901/JME.2021.10.126

Abstract

Abstract: 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.

Key words: high temperature sealing coating, micromorphology, microstructure, bionic structural design, whisker toughening

CLC Number:

TG174

CHENG Taotao, WANG Zhiping, DAI Shijie, DING Kunying, MA Xiang. Research Progress of Ceramic-based High Temperature Sealing Coating for Aeroengines[J]. Journal of Mechanical Engineering, 2021, 57(10): 126-136,147.

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