YCrO_(3)钙钛矿陶瓷高温红外隐身涂层制备与性能研究

Research on Preparation and Properties of YCrO_(3)Perovskite High Temperature Infrared Stealth Coating

基于飞行器热端部件温度逐渐升高的现状以及对红外隐身性能的需求,且现有红外隐身材料及涂层体系无法在900℃高温环境下长时、有效地发挥红外隐身性能,因此亟需开发适用于900℃高温环境的新型高性能红外隐身材料及涂层。通过喷雾干燥和固相反应法合成球形YCrO_(3)粉末,采用高速氧燃料喷涂(HVOF)和大气等离子喷涂(APS)技术制备双层CoNiCrAlY YCrO_(3)涂层,观察了粉体及涂层微观结构,测试了涂层结合强度以及涂层在900℃下的热震性能和红外发射率。研究结果表明,所制备的涂层具有较高的结合强度,且在900℃温度下表现出优异的热稳定性和低红外发射率,该涂层在高温红外隐身领域具有较大的应用潜力。

The rising temperatures within the hot end segments of aircraft and the requirement for infrared stealth capabilities highlight a critical issue:the current infrared stealth materials and coatings are unable to maintain their effective stealth performance in high-temperature conditions of 900℃for extended periods.Consequently,there is an immediate need to innovate and develop new high-performance infrared stealth materials and coatings that can operate in such extreme temperatures.The spheroidal YCrO_(3) powder was initially synthesized through spray drying and solid-state reaction methods.Subsequently,a double-layered CoNiCrAlY YCrO_(3) coating was prepared by high velocity oxygen fuel(HVOF)and atmospheric plasma spray(APS)techniques.The microstructure of powder and coating was observed.The bonding strength,thermal shock and infrared emissivity of coating at 900℃were measured.The results show that the coating has high bonding strength,excellent thermal stability and low infrared emissivity at 900℃,and the coating has great application potential in the field of high temperature infrared stealth.