CAJ | 학술논문

用ICI生产的PEEK/AS4复合材料为样品,采用扫描电镜、光学显微镜和超声检测技术,结合化学浸湿技术,测定了复合材料的微观结构,包括基体树脂聚集态结构和增强材料碳纤维的排列结构,纤维/基体的界面结构和复合材料的物理性能.实验结果表明:该复合材料中碳纤维的体积分数为60%,平均直径为6.9 μm,碳纤维排列均匀.碳纤维规整的排列在复合材料中,加强了复合材料中纤维的取向性能,决定了该复合材料的各向异性特征.聚醚醚酮树脂在复合材料中呈现典型的球状结构,这种晶体结构发生在树脂相或纤维表面,导致聚醚醚酮基体和碳纤维之间存在良好的界面结合力.在预浸层模压制成复合材料片材时,可以观察到在邻层之间有一个树脂密度较大的区域,这种现象在(±45)4s复合材料中尤为明显.这些树脂区域在复合材料中可以吸收能量,对复合材料的抗疲劳性能具有很大影响.
용ICI생산적PEEK/AS4복합재료위양품,채용소묘전경、광학현미경화초성검측기술,결합화학침습기술,측정료복합재료적미관결구,포괄기체수지취집태결구화증강재료탄섬유적배렬결구,섬유/기체적계면결구화복합재료적물이성능.실험결과표명:해복합재료중탄섬유적체적분수위60%,평균직경위6.9 μm,탄섬유배렬균균.탄섬유규정적배렬재복합재료중,가강료복합재료중섬유적취향성능,결정료해복합재료적각향이성특정.취미미동수지재복합재료중정현전형적구상결구,저충정체결구발생재수지상혹섬유표면,도치취미미동기체화탄섬유지간존재량호적계면결합력.재예침층모압제성복합재료편재시,가이관찰도재린층지간유일개수지밀도교대적구역,저충현상재(±45)4s복합재료중우위명현.저사수지구역재복합재료중가이흡수능량,대복합재료적항피로성능구유흔대영향.
Polyetheretherketone (PEEK) is a super thermal engineering plastic material which has significant performances, particularly in respects of fracture toughness, damage tolerance and resistance to hot, and wet environments. It is considered to be a foremost thermoplastic matrix in composite materials for the application of high technologies such as aerospace field, automobile industry, and marine application, etc. The manufacturing of PEEK/AS4 involves the components of composite materials and creates the microstructure, which ultimately governs the properties of the composites. The microstructures of PEEK/AS4 composites such as voids, fibre organisation and matrix morphology were examined by optical microscope, image analysis and scanning electron microscope (SEM) in this work with satisfying results. Significant features are highlighted. Composites are essentially heterogeneous systems but the level of that heterogeneity depends on the scale of examination. The composites have 60% by volume of carbon fibres with an average diameter of 6.9 μm. The distribution of the carbon fibres is approximately uniform. The carbon fibres are generally well aligned in the laminates although some fibre misalignment exists. A high degree of fibre alignment optimises the reinforcing effect in the fibre direction. Spherulite structure is significantly evident in the matrix morphology. This crystalline structure occurs within the bulk of the matrix phase or from the fibre surfaces. A good bonding between the matrix and fibres is evident and a resin-rich layer between adjacent plies is visible. These provide the composites with good interface and interphase adhesion. The resin-rich area is significant for(±45 ) 4s lay-ups, being associated with a significant shear stress in the deformation of this type of material.