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New application of intercalation on improving toughness of carbon/carbon composites

机译：插层在提高碳/碳复合材料韧性方面的新应用

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摘要

Toughness is one of the key mechanical properties of carbon/carbon composites for practical application. The present paper reports a new method to improve the toughness of carbon/carbon composites by intercalation of bromine into the graphite microcrystals of pyrolytic carbon. The intercalated pyrolytic carbon was characterized by X-ray diffraction (XRD), TG and DSC. The XRD results confirm that the graphite microcrystals of pyrolytic carbon could be intercalated by bromine, although the weight loss in TG measurement indicates a low content of the intercalation in the pyrolytic carbon. According to the three-point bending test, the flexural strength of carbon/carbon composites with bromine intercalation decreases 10%, while the flexural modulus and deflection increases 10 and 18%, respectively. At same time, a tough-like fracture mode can be observed in the intercalated carbon/carbon composites. The involved mechanism of the improving toughness of carbon/carbon composites will be discussed.
机译：韧性是实际应用中碳/碳复合材料的关键机械性能之一。本文报道了一种通过将溴嵌入热解碳的石墨微晶中提高碳/碳复合材料韧性的新方法。通过X射线衍射（XRD），TG和DSC对插入的热解碳进行了表征。 XRD结果证实了热解碳的石墨微晶可以被溴嵌入，尽管TG测量中的重量损失表明热解碳中的嵌入量低。根据三点弯曲试验，含溴的碳/碳复合材料的弯曲强度降低了10％，而弯曲模量和挠度分别增加了10％和18％。同时，在插入的碳/碳复合材料中可以观察到类似韧的断裂模式。将讨论提高碳/碳复合材料的韧性所涉及的机理。

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