Effects of temperature profiles of microwave curing processes on mechanical properties of carbon fibre–reinforced composites
Effects of temperature profiles of microwave curing processes on mechanical properties of carbon fibre–reinforced composites
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DOI：
10.1177/0954405415596142
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Xian Hang;Yingguang Li;Xiaozhong Hao;Nanya Li;Y. Wen
中科院分区：
文献类型：
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作者：
Xian Hang;Yingguang Li;Xiaozhong Hao;Nanya Li;Y. Wen
复合材料的微波固化是一种比传统热固化更快地制备复合材料构件的有前途的技术。但是，缩短的温度曲线，决定微波固化过程的持续时间，将如何影响固化零件的结果仍然不清楚。在这项研究中，微波固化过程中的碳纤维增强复合材料的力学性能的不同温度曲线的影响进行了实验研究。结果表明，微波固化复合材料具有与常规热固化复合材料相似的固化动力学，其层间剪切强度和弯曲强度高于热固化复合材料，拉伸强度和压缩强度略低于热固化复合材料。温度曲线中加热速率的增加在一定范围内提高了复合材料的压缩强度和弯曲强度，但适度降低了拉伸强度和层间强度;保温时间的减少会适度降低复合材料的力学性能，但层间剪切强度除外。层间剪切试验后的断裂表面的显微照片表明，微波固化对纤维-基体界面结合的增强效果，但这种效果可以稍微妥协时，增加加热速率。这些结果可以用于减少制造时间和保持微波固化复合材料的机械性能之间的权衡。
The microwave curing of composites is a promising technology to manufacture the composite components faster than conventional thermal curing. But how the shortened temperature profiles, which determine the duration of microwave curing processes, will affect the outcome of cured parts is still not clear. In this study, the effects of microwave curing processes governed by different temperature profiles on the mechanical properties of carbon fibre–reinforced composite material have been experimentally investigated. The results showed that microwave-cured composites have similar curing kinetics as the conventional thermally cured ones, and they were better in interlaminar shear and flexural strengths than thermally cured ones, while slightly lower in tensile and compressive strengths. The increase in heating rates in the temperature profiles enhanced the compressive and flexural strengths of the composites within a certain range, but moderately compromised the tensile and interlaminar strengths; the reduction in holding time can decrease the mechanical performances of the composites moderately, except for the interlaminar shear strength. The micrographs of the fracture surfaces after the interlaminar shear tests demonstrated the enhancing effect of microwave curing on the fibre–matrix interfacial bonding, but this effect can be slightly compromised when increasing the heating rates. These results could serve for the tradeoffs between reducing the manufacturing time and preserving the mechanical properties of the microwave-cured composites.