Performance Optimization of New High Temperature Ceramic Coating on Hot End Part Surface of Aero-engine
The work aims to improve the long-term protective coating W-200 on the hot end part surface of aero-engine,and explore a new high-temperature ceramic coating on the superalloy surface with better high temperature stability and not easy to collapse so as to solve the problem of brittle porcelain and peeling exposed by W-200 coating on the superalloy surface.By ad-justing expansion coefficient,softening temperature and crystallization temperature,new high-temperature resistant glass and filler were developed,and new high-temperature ceramic coating slurry was prepared.The new high-temperature ceramic coat-ing W-400 could be successfully sintered on the superalloy surface at 1 150～1 230℃,and had a larger expansion coefficient,which could better match the expansion coefficient of superalloy substrate.At the same time,the crystallization temperature of W-400 was about 868～1 213℃,and the coating had better high-temperature stability,thermal shock resistance and resistance than W-200 in the crystallization temperature range.The new high-temperature ceramic coating W-400 solves the problem that W-200 high-temperature ceramic coating is likely to collapse after sintering on the hot end superalloy alloy parts surface of aeroengine.According to the research foundation of this project,it is possible to develop a new type of high-temperature ceramic coating with higher temperature resistance that can be successfully sintered on other metal surfaces at 1 250～1 400℃in the future.
high temperature ceramic coatingsuperalloyaircraft engineglassceramicanti-spalling
NETL
NSTL
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