Abstract

The results of the effect of high-fluence irradiation (fluence ~3 × 10¹⁸ cm^–2) with 30-keV C⁺ ions at a temperature of 250°C on the structure and surface morphology of polyacrylonitrile-based carbon fibers reinforcing the composite KUP-VM are presented and discussed. Scanning electron microscopy shows that the irradiation of carbon fibers with their own ions does not lead, as in the cases of irradiation with ions of inert gases and nitrogen, to corrugation of the fiber surface. The roughness of the composite surface remains comparable to the nonirradiated sample. According to Raman-spectroscopy data, irradiation with carbon ions at temperatures above that of dynamic annealing of radiation-induced damage leads to the formation of a disordered graphite-like layer, as in the cases of irradiation with inert-gas ions. The lack of corrugation of the carbon-fiber surface under irradiation with carbon ions is associated with the lack of a gradient of radiation-induced damage in the modified layer and a texture characteristic of a carbon-fiber shell based on polyacrylonitrile.

中文翻译：

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碳离子高通量辐照下碳纤维表面的改性

摘要

30-keV C ⁺高通量辐照（通量~3 × 10 ¹⁸ cm ^{–2 ）的效果结果}提出并讨论了在 250°C 温度下离子对增强复合材料 KUP-VM 的聚丙烯腈基碳纤维的结构和表面形态的影响。扫描电子显微镜表明，碳纤维本身的离子辐照不会像惰性气体和氮气离子辐照的情况那样导致纤维表面起皱。复合材料表面的粗糙度与未辐照样品相当。根据拉曼光谱数据，在高于辐射诱导损伤的动态退火温度的温度下用碳离子照射会导致形成无序的类石墨层，就像用惰性气体离子照射的情况一样。