Abstract

We perform submicron corrugation of the surface of nongraphitized (processing temperature 1400°C) and graphitized (processing temperature 2800°C) Zoltek PX35 polyacrylonitrile carbon fibers by high-fluence irradiation with nitrogen and argon ions with an energy of 30 keV. The microgeometry of the surfaces of nongraphitized and graphitized carbon fibers irradiated with nitrogen ions is characterized by the presence of corrugations with different periods and heights at the same inclination of their faces. The similarity and difference in the microstructure of the surface layer of carbon fiber after heat treatment and ion irradiation, observed by Raman spectroscopy data, are analyzed and discussed. The data obtained suggest an increase in the tensile strength of the modified carbon-fiber layer with a decrease in the elastic modulus. The reasons and conditions for the corrugation of carbon fibers during their ion irradiation are discussed.

中文翻译：

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高通量离子辐照的聚丙烯腈基碳纤维的亚微米波纹

摘要

我们通过高通量能量和30 keV的氮气和氩离子辐照，对非石墨化（加工温度1400°C）和石墨化（加工温度2800°C）的Zoltek PX35聚丙烯腈碳纤维表面进行亚微米波纹。用氮离子辐照的未石墨化和石墨化碳纤维表面的微观几何形状的特征是，在相同的表面倾斜度下，存在着具有不同周期和高度的波纹。通过拉曼光谱数据观察和讨论了热处理和离子辐照后碳纤维表面层微观结构的异同。获得的数据表明，改性碳纤维层的拉伸强度增加，而弹性模量降低。