Abstract:NiCoCrAlY bottom layer and YSZ intermediate layer were prepared by plasma, and nickel-based boron nitride (NiCrFeAl-BN) and nickel-based bentonite (NiCrFeAl-B.e) top wearable sealing coatings were prepared by flame spraying. Ginding the coatings against TC11 simulated blades was carried out on a high temperature super high speed test rig, setting room temperature and 600°C, and different feed rate conditions. The two coatings were evaluated for their abradability at room temperature and 600°C with different feed rates. The results show that the feed rate has a greater effect on the microstructure of the two coatings after scraping, but has a smaller effect on the thickness of the sealing layer. The increase of temperature improves the destructive effect of both coatings, and the abradability decreases. The abradability of NiCrFeAl-BN coating is better than that of NiCrFeAl-B.e coating under the same working condition, but the value of the height-dependent wear ratio (IDR) of the blades is still larger after grinding against the blades. After the blades were electroplated with the BN coating, the IDR changes from 16.05% to 8.04% with a feed rate of 5 μm/s, which plays a certain role in protecting the blade.