随着“深蓝战略”的实施，我国先进航空发动机对防钛火耐腐蚀封严材料的需求日益增强。现役典型发动机压气机封严材料多孔Al-BN复合涂层具备防钛火功能，但耐腐蚀性差；国外PI泡沫的耐腐蚀性优良，但不具备防钛火功能。Al-BN复合涂层和PI均无法兼具防钛火和耐腐蚀双重功能，因此急需研制新型防钛火耐腐蚀封严材料。本论文研究了Al和NiAl-BN在高温摩擦过程中的扩散转移机理；探究了耐腐蚀性良好的Ag-BN和Ni-BN两种复合涂层的防钛火效果；制备了铝颗粒/PI复合材料并研究了材料的防钛火效果和耐腐蚀性。在此基础上，进一步研究了铝蜂窝/PI和铝蜂窝/Al-BN/PI的防钛火效果和耐腐蚀性。论文主要的研究内容和结论如下：（1）通过Al和NiAl-BN的高温摩擦实验研究发现，Al在400℃-600℃能够向Ti6Al4V合金发生扩散转移，并且在600℃时，在Ti6Al4V合金表面形成金属间化合物TiAl3，铝原子的扩散活化能为28.22 kJ·mol-1；NiAl-BN在600℃也能向Ti6Al4V合金发生扩散转移。（2）通过摩擦实验和高速刮擦实验，对比了等离子喷涂Ag-BN和Ni-BN两种复合涂层的防钛火效果。摩擦实验表明，25℃-600℃，Ag-BN和Ni-BN两种复合涂层的摩擦系数分别为0.39-0.65和0.51-0.65，Ag和Ni发生转移的温度不同，Ag发生转移的温度比Ni发生转移的温度低。高速刮擦实验表明，Ag-BN和Ni-BN两种复合涂层的可刮削性能指数分别为29.16和4.67，Ag-BN复合涂层具有更好的可刮削性，与两种涂层对磨的Ti6Al4V合金表面均受到磨损，Ag-BN和Ni-BN两种复合涂层的防钛火效果比Al-BN复合涂层的防钛火效果差。（3）通过热压烧结制备了铝颗粒增强PI复合材料，分析了材料的防钛火效果和耐腐蚀性。摩擦实验表明，加入铝颗粒的PI在100℃-500℃具有良好的润滑性能，在500℃的摩擦系数仅有0.28。在摩擦中，Al在Ti6Al4V合金表面形成转移层，能保护合金避免磨损。高速刮擦实验表明，加入铝颗粒的PI具有良好的可刮削性，材料的可刮削性能指数为-479，与之对磨的Ti6Al4V合金表面形成了转移层，合金几乎没有磨损。在刮擦中，材料表面和合金表面出现热量富集，热量富集导致PI发生了碳化分解。因此，铝颗粒/PI复合材料的防钛火效果好，但是无法避免PI分解。通过盐雾腐蚀实验发现，经30天盐雾腐蚀，铝颗粒/PI复合材料形貌未发生明显变化，铝颗粒的腐蚀程度低，铝颗粒/PI复合材料的耐腐蚀性优良。（4）提出铝蜂窝和Al-BN增强PI结构设计并制备了防钛火耐腐蚀新材料。摩擦实验表明，加入铝蜂窝和Al-BN的PI具有良好的润滑性能，在450℃摩擦系数仅有0.28。在摩擦中，Ti6Al4V合金表面发生了粘着层转移。高速刮擦实验表明，铝蜂窝/PI和铝蜂窝/Al-BN/PI两种复合材料的可刮削性能指数分别为357.5和-11.5，与之对磨的Ti6Al4V合金表面均发生了粘着层转移，其中，铝蜂窝/Al-BN/PI的可刮削性更好，与其对磨的合金几乎没有磨损。在刮擦中，由于铝蜂窝起到传热作用，从而PI未发生碳化分解。因此，铝蜂窝/Al-BN/PI具有良好的防钛火效果，并且在摩擦中不易发生热量富集。通过盐雾腐蚀实验发现，经30天盐雾腐蚀，铝蜂窝/Al-BN/PI复合材料表面无明显变化，腐蚀主要表现为铝蜂窝的点蚀，PI和Al-BN腐蚀程度低，复合材料的耐腐蚀性优良。基于上述实验结果，通过对比材料的摩擦系数、可刮削性能指数、Ti6Al4V合金的磨损情况和耐盐雾腐蚀性发现，铝蜂窝/Al-BN/PI是上述材料中性能最好的防钛火耐腐蚀封严材料。;With the implementation of the "Dark Blue Strategy", my country's advanced aero-engines have increasingly increased demand for anti-titanium fire and corrosion-resistant sealing materials. The porous Al-BN composite coating of the typical engine compressor seal material in service has the function of anti-titanium fire, but the corrosion resistance is poor; the foreign PI foam has excellent corrosion resistance, but does not have the function of anti-titanium fire. Neither Al-BN composite coating nor PI can have the dual functions of anti-titanium fire and corrosion resistance. Therefore, it is urgent to develop a new type of anti-titanium fire and corrosion-resistant sealing material.This paper studied the diffusion and transfer mechanism of Al and NiAl-BN during high-temperature friction; explored the anti-titanium effect of Ag-BN and Ni-BN composite coatings with good corrosion resistance; prepared aluminum particles/PI composite materials and studied the material's anti-titanium fire effect and corrosion resistance. On this basis, the anti-titanium fire effect and corrosion resistance of aluminum honeycomb/PI and aluminum honeycomb/Al-BN/PI were further studied. The main research contents and conclusions of the paper were as follows:(1) Through the high temperature friction experiment study of Al and NiAl-BN, it was found that Al diffused and transferred to Ti6Al4V alloy at 400℃-600℃, and at 600℃, intermetallic compound TiAl3 was formed on the surface of Ti6Al4V alloy. The activation energy of diffusion of aluminum was 28.22 kJ·mol-1; NiAl-BN diffused and transferred to Ti6Al4V alloy at 600℃.(2) Through friction experiment and high-speed scratch experiment, the anti-titanium fire effect of plasma sprayed Ag-BN and Ni-BN composite coatings was compared. The friction experiment showed that the friction coefficients of Ag-BN and Ni-BN composite coatings were 0.39-0.65 and 0.51-0.65 respectively at 25℃-600℃. The temperature at which Ag and Ni transfer were different, and the temperature ratio of Ag transferred was lower than that of Ni. High-speed scratching experiments showed that the scratchability indexes of the Ag-BN and Ni-BN composite coatings were 29.16 and 4.67, respectively. The Ag-BN composite coating had better scratchability, and it was opposite to the two coatings. The surface of the Ti6Al4V alloy was abraded, and the anti-titanium fire effect of the two composite coatings of Ag-BN and Ni-BN was worse than that of the Al-BN composite coating.(3) The aluminum particle-reinforced PI composite material was prepared by hot pressing and sintering, and the anti-titanium fire effect and corrosion resistance of the material were analyzed. The friction experiment showed that the PI with aluminum particles had good lubricating performance at 100℃-500℃, and the friction coefficient at 500℃ was only 0.28. In friction, Al was transferred to the surface of Ti6Al4V alloy, which protected the alloy from wear. The high-speed scraping experiment showed that the PI with aluminum particles had good scrapability, and the scrapability index of the material was -479, and a transfer layer was formed on the surface of the Ti6Al4V alloy, and the alloy had almost no wear. During the scratching, heat accumulation occurred on the surface of the material and the alloy, and the heat accumulation led to carbonization and decomposition of PI. Therefore, the aluminum particle/PI composite material had a good anti-titanium fire effect, but the decomposition of PI was not avoided. Through salt spray corrosion experiments, it was found that after 30 days of salt spray corrosion, the morphology of aluminum particles/PI composites did not change significantly, the corrosion degree of aluminum particles was low, and the corrosion resistance of aluminum particles/PI composites was excellent.(4) Proposed aluminum honeycomb and Al-BN reinforced PI structure design and prepared new titanium fire-resistant and corrosion-resistant materials. Friction experiments showed that PI with aluminum honeycomb and Al-BN had good lubricating properties, and the friction coefficient was only 0.28 at 450°C. During friction, the adhesion layer transfer occurred on the surface of Ti6Al4V alloy. The high-speed scratching experiment showed that the scrapable performance indexes of the aluminum honeycomb/PI and aluminum honeycomb/Al-BN/PI composite materials were 357.5 and -11.5, respectively, and the adhesion layer transfer occurred on the surface of the Ti6Al4V alloy. Among them, the aluminum honeycomb/Al-BN/PI had better scrapability, and there was almost no wear with the alloy to be ground. During scratching, because the aluminum honeycomb played a role of heat transfer, PI did not undergo carbonization and decomposition. Therefore, aluminum honeycomb/Al-BN/PI had a good anti-titanium fire effect, and it was not easy to generate heat enrichment during friction. Through salt spray corrosion experiments, it was found that after 30 days of salt spray corrosion, the surface of the aluminum honeycomb/Al-BN/PI composite material had no obvious change. The corrosion was mainly manifested as the pitting corrosion of the aluminum honeycomb. The corrosion degree of PI and Al-BN was low, and the corrosion resistance of the composite material was excellent. Based on the above experimental results, by comparing the friction coefficient, scraping performance index, wear of Ti6Al4V alloy and salt spray corrosion resistance, it was found that aluminum honeycomb/Al-BN/PI was the best anti-titanium fire resistance and corrosion seal material among the above materials.