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首页> 外文期刊>Journal of Applied Polymer Science >Microstructure and fracture behavior of (Co) injection-molded polyamide 6 composites with short glass/carbon fiber hybrid reinforcement
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Microstructure and fracture behavior of (Co) injection-molded polyamide 6 composites with short glass/carbon fiber hybrid reinforcement

机译：短玻璃/碳纤维混合增强的（Co）注塑聚酰胺6复合材料的微观结构和断裂行为

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摘要

The mechanical and fracture properties of injection molded short glass fiber)/short carbon fiber reinforced polyamide 6 (PA 6) hybrid composites were studied. The short fiber composites of PA 6 glass fiber, carbon fiber, and the hybrid blend were injection molded using a conventional machine whereas the two types of sandwich skin-core hybrids were coinjection molded. The fiber volume fraction for all formulations was fixed at 0.07. The overall composite density, volume, and weight fraction for each formulation was calculated after composite pyrolysis in a furnace at 600 degrees C under nitrogen atmosphere. The tensile, flexural, and single-edge notch-bending tests were performed on all formulations. Microstructural characterizations involved the determination of thermal properties, skin-core thickness, and fiber length distributions. The carbon fiber/PA 6 (CF/PA 6) formulation exhibits the highest values for most tests. The sandwich skin-core hybrid composites exhibit values lower than the CF/PA 6 and hybrid composite blends for the mechanical and fracture tests. The behaviors of all composite formulations are explained in terms of mechanical and fracture properties and its proportion to the composite strength, fiber orientation, interfacial bonding between fibers and matrix, nucleating ability of carbon fibers, and the effects of the skin and core structures. Failure mechanisms of both the matrix and the composites, assessed by fractographic studies in a scanning electron microscope, are discussed. (c) 2005 Wiley Periodicals, Inc.
机译：研究了注塑成型的短玻璃纤维/短碳纤维增强聚酰胺6（PA 6）杂化复合材料的力学性能和断裂性能。使用常规机器将PA 6玻璃纤维，碳纤维和杂化共混物的短纤维复合材料注塑成型，而将两种类型的夹心皮芯混合材料共注塑。所有制剂的纤维体积分数固定为0.07。在氮气氛下于600摄氏度的炉子中进行复合热解后，计算每种配方的总复合密度，体积和重量分数。在所有配方上均进行了拉伸，弯曲和单边缺口弯曲测试。微观结构表征涉及热性能，皮芯厚度和纤维长度分布的确定。在大多数测试中，碳纤维/ PA 6（CF / PA 6）配方显示出最高的值。夹层皮芯混合复合材料的值低于CF / PA 6和混合复合材料共混物的力学性能和断裂性能。根据机械和断裂性能及其与复合强度，纤维取向，纤维与基质之间的界面结合，碳纤维的成核能力以及表皮和核心结构的影响等比例来解释所有复合配方的行为。讨论了基体和复合材料的破坏机理，通过在扫描电子显微镜中的分形学研究来评估。 （c）2005年Wiley Periodicals，Inc.

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