Study of the radiation resistance of a carbon fiber based on viscose in carbon-carbon and carbon-ceramic composites

The results of the experimental study of the crystalline structure and morphology of carbon fibers based on viscose in a FEBUS carbon-ceramic composite and its preform as functions of temperature ranging from room values to ∼400°C under irradiation with Ar+ ions with an energy of 10–30 keV are obtained. The average level of radiation damage corresponding to the initial fiber graphitization (〈νgr> ∼ 80 dpa) is determined based on an analysis of the energy dependences of the ion-electron emission coefficient at different irradiation temperatures. It is shown that carbon fibers based on viscose are immune (in contrast to polyacrylonitrile fibers) to ion-induced destruction in the form of crimping. This is indicative of their enhanced radiation resistance.