摘要： 以新型耐高温聚芳醚腈酮(PPENK)树脂作为涂料成膜物质，纳米SiC和Si₃N₄共同作为耐磨填料，制备了一系列新型耐高温耐磨PPENK/SiC/Si₃N₄纳米复合涂料。对复合涂层的摩擦学性能及热性能进行研究，通过扫描电镜(SEM)观察涂层磨损表面形貌，分析涂层磨损机理。结果表明:纳米SiC和Si₃N₄填料能有效改善纯PPENK树脂涂层的摩擦磨损性能。当PPENK树脂含量为22%，m(SiC)∶m(Si₃N₄)为3∶2时，涂层摩擦系数最小;当PPENK树脂含量为20%，纳米填料m(SiC)∶m(Si₃N₄)为1∶1时，涂层磨损质量损失最小。热重分析(TGA)表明无机纳米填料的加入对涂层的热性能有略微增强的作用。PPENK/SiC/Si₃N₄纳米复合涂层的磨损机理以粘着磨损为主，兼有犁耕磨损。

关键词: 聚芳醚腈酮, 纳米SiC, 纳米Si₃N₄, 高温耐磨涂层

Abstract: A novel heat resistant anti-wear coating based on poly(phthalazinone ether nitrile ketone) (PPENK) and nanoparticles SiC and Si₃N₄ was prepared by ultrasonic blending. The tribological and thermal properties of the composite coatings were investigated. Scanning electron microscope(SEM) was used to study the wearing mechanism. The results showed that the addition of nanoparticles SiC and Si₃N₄ were effective to improve tribological property of PPENKing. When the SiC/Si₃N₄ mass ratio was 3: 2 and the PPENK content reached 22% of the resin, the lowest friction coeficient was obtained. When the SiC/Si₃N₄ mass ratio was 1: 1 and the PPENK content reached 20%, the least wearing mass loss was obtained. The result of TGA indicated that the filler only slightly improved the thermal property of PPENK. The wearing mechanism of the PPENK/ SiC/Si₃N₄ composite coating was mainly adhesive wearing, with some ploughing mechanism .

Key words: poly( aryl ether nitrile ketone), nano-SiC, nano-Si₃N₄, heat resistant anti-wearing coating