NiCrFeAl-BN涂层和NiCrFeAl-B.e涂层对磨TC11合金可磨耗性能研究

采用等离子制备NiCoCrAlY底层和YSZ中间层，火焰喷涂制备镍基氮化硼（NiCrFeAl-BN）和镍基膨润土（NiCrFeAl-B.e）面层可磨耗封严涂层。在高温超高速可磨耗试验机上进行涂层与TC11模拟叶片对磨，设置室温和600℃，不同进给速率条件，对两种涂层进行可磨耗性能评价。研究结果表明：进给速率对两种涂层刮削后微观形貌影响较大，但对封严层厚度影响较小。温度提高，对两种涂层破坏作用都有所增加，可磨耗性能下降。相同工况下NiCrFeAl-BN涂层的可磨耗性均优于NiCrFeAl-B.e涂层，但对磨后的叶片高度磨损比（IDR）值仍较大，在叶片叶尖电镀BN涂层后，进给速率为5μm/s时，IDR由16.05%变为8.04%，起到一定保护叶片的作用。

Study on the Wearability of NiCrFeAl BN Coating and NiCrFeAl B.e Coating for Grinding TC11 Alloy

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.