High emissivity coatings on nickel-based superalloy, with good infrared radiating ability and good high temperature resistance, were prepared at room temperature, using preceramic polymer cured at room-temperature as coating former and CeO₂ and B₄C as passive high emissivity fillers. The influences of high temperature and wind channel test on the microstructure and thermal performance of the high emissivity coating were investigated in detail. The high emissivity coating has good thermal stability and no cracking and flaking after heating at 1100 K and the wind tunnel test. The emissivity of the coating reached 0.85−0.92 between room temperature and 1100 K. The high emissivity coating on the nickel-based alloy can make the back temperature of the nickel-based alloy decrease from 686 to 646 ℃.

在室温下，使用在室温下固化的陶瓷前聚合物作为涂层形成剂和CeO ₂和B ₄，在室温下制备了具有良好的红外辐射能力和良好的耐高温性的镍基高温合金上的高发射率涂层。C为无源高发射率填料。详细研究了高温和风道试验对高发射率涂层的组织和热性能的影响。高辐射率涂层具有良好的热稳定性，并且在1100 K加热和风洞试验后没有开裂和剥落。在室温和1100 K之间，涂层的发射率达到0.85-0.92。在镍基合金上的高发射率涂层可使镍基合金的背温度从686℃降低到646℃。