聚芳醚腈酮/SiC/Si_3N_4耐高温耐磨纳米复合涂层研究

Study on PPENK/SiC/Si_3N_4 Heat Resistant Anti-Wearing Nano-Composite Coating

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。

A novel heat resistant anti -wear coating based on poly （phthalazinone ether nitrile ketone） （PPENK） and nanopartieles SiC and Si3 N4 was prepared by ultrasonic blending. The tribologieal and ther- mal 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 nanopartieles SiC and Si3N4 were ef- fective to improve tribological property of PPENK coating. When the SiC/Si3N4 mass ratio was 3：2 and the PPENK content reached 22% of the resin, the lowest friction coefficient 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 re- sult 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.