АННОТАЦИЯ Рассматривается применение композитов для локальной радиационной защиты бортовой радиоэлектронной аппаратуры космических аппаратов. Проведен аналитический обзор известных радиационно-защитных композитов. Установлено, что при выборе материала защиты, в-первую очередь, следует руководствоваться технологичностью и экономической доступностью материала, тогда как экранирующие свойства материалов можно регулировать путем варьирования толщины защитного композита, при незначительном изменении массы за счет его малых количеств, необходимых для локального нанесения на электронные компоненты. ABSTRACT The use of composites for local radiation protection of on-board electronic equipment of spacecraft is considered. An analytical review of the known radiation-protective composites is carried out. It was established that when choosing a protection material, first of all, one should be guided by the manufacturability and economic availability of the material, while the shielding properties of materials can be controlled by varying the thickness of the protective composite, with a slight change in mass due to its small quantities required for local application to electronic Components. Ключевые слова: локальная радиационная защита, ионизирующие излучения, композиционный материал.
The study focuses on the radiation resistance of a composite filled with fine tungsten powder having the 200–500 nm particle size. The studied composite is designed to provide radiation protection of electronic equipment. A sample with the test material was exposed to continuous spectrum X-ray radiation to an absorbed dose of 3 MGy. A characteristic of radiation resistance was sample microhardness measured before and after X-ray irradiation. Scanning electron microscopy was used to study the microstructure of a sample transverse cleavage after irradiation, and it was found that the sample had no visible defects in its structure. This result can be explained by uniform energy dispersion from local stresses due to high degree of composite filling with tungsten powder having a high thermal conductivity coefficient. The study of sample microhardness showed its 10 % increase attributable to the radiation hardening effect where increasing strength results in a simultaneous increase in microhardness. Experiments proved that this effect is manifested with an increase in the absorbed radiation dose.
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