Abstract:NiCrAl/NiCg abradable sealing coatings can improve the efficiency of turbine engines and have been widely used in high-pressure compressors in aero-engines. In this paper, the high-temperature and high-speed scratching test method were used to carry out the wearability test of the NiCrAl/NiCg sealing coating under simulated service conditions. The wear ratio and other data were analyzed to evaluate the abradability of the coatings. The results showed that the NiCrAl/NiCg sealing coating exhibits excellent abradability under different test conditions and can protect the blade from damage; when the feed rate was increased from 5 μm/s to 500 μm/ s, the IQR The value and IDR of NiCrAl/NiCg sealing coating were significantly improved, and the abradability of NiCrAl/NiCg sealing coating decreased. The single scraping depth was an important factor affecting the wearability of NiCrAl/NiCg sealing coating. The smaller the depth of a single scrape, the more excellent abradability of the /NiCg sealing coating was. This research provides new basic data for the exploration of the interaction between the blade tip and the abradable seal coating in aero-engine applications, and also provides a reference for future seal coating performance research and selection.