摘要
在航空器关键部件面临极端磨损工况的背景下,开发具备高耐磨性的涂层对提升飞机服役可靠性具有重要意义。本文通过Bi掺杂Ti_(4)AlN_(3)三元层状氮化物材料(MAX相材料)来增强航空聚氨酯(PU)涂层的耐磨性能,提升在飞机发动机、襟副翼、起落架等关键部位的应用潜力。首先,通过化学法成功制备Bi掺杂Ti_(4)AlN_(3)MAX相材料(Bi-Ti_(4)AlN_(3)),将Bi-Ti_(4)AlN_(3)以适当比例加入PU涂料体系中,采用喷涂手段制备耐磨涂层。摩擦磨损试验显示,相较于纯PU涂层,Bi掺杂Ti_(4)AlN_(3)/PU耐磨涂层在相同条件下表现出更高的耐磨性能,磨损率显著降低。通过XRD、SEM、EDS、XPS、拉曼光谱等表征手段对材料结构与性能进行详细分析,结果表明,Bi掺杂有效改善了Ti_(4)AlN_(3)的微观结构和电子结构,提高了硬度和耐磨性。进一步分析表明,Bi-Ti_(4)AlN_(3)与PU之间的相互作用也是提升涂层耐磨性能的关键因素之一,这种相互作用不仅涉及物理层面的结合,还包括化学层面的相容性和界面反应,减少了涂层在磨损过程中的损伤,为制备高性能耐磨PU涂层提供了新思路和新方法,对拓展航空领域PU耐磨涂层的应用具有重要意义。
Under the extreme wear conditions encountered by critical components of aircraft,the development of high wear-resistant coatings holds significant importance for enhancing operational reliability and reducing maintenance costs.This study employs Bi-doped Ti_(4)AlN_(3) ternary layered nitride materials(MAX phase materials)to reinforce the wear resistance of aerospace polyurethane(PU)coatings,thereby improving their application potential in key aircraft components such as engines,flaps/ailerons,and landing gear.Initially,Bi-doped Ti_(4)AlN_(3) MAX phase materials(Bi-Ti_(4)AlN_(3))were successfully synthesized via a chemical method.Subsequently,Bi-Ti_(4)AlN_(3) was incorporated into the PU coating system at an optimal ratio,and wear-resistant coatings were fabricated using a spray-coating technique.Tribological tests demonstrated that the Bi-Ti_(4)AlN_(3)/PU composite coatings exhibited superior wear resistance compared to pure PU coatings under identical conditions,with a significant reduction in wear rate.Comprehensive characterization through XRD,SEM,EDS,XPS,and Raman spectroscopy revealed that Bi doping effectively optimized the microstructure and electronic structure of Ti_(4)AlN_(3),thereby enhancing its hardness and wear resistance.Further analysis indicated that the interfacial interactions between Bi-Ti_(4)AlN_(3) and the PU matrix,involving not only physical bonding but also chemical compatibility and interfacial reactions,played a crucial role in mitigating coating damage during wear processes.It provides novel insights and methodologies for developing high-performance wearresistant PU coatings,offering substantial implications for expanding the application of PU-based tribological coatings in the aerospace sector.
作者
程铭
李文
常伟
Cheng Ming;Li Wen;Chang Wei(AVIC Manufacturing Technology Institute,Beijing 100024,China)
出处
《航空科学技术》
2025年第10期88-96,共9页
Aeronautical Science & Technology
基金
航空科学基金(2022Z043025001)。
