Thin-film neutron converters based on boron carbide B4C, enriched with the 10B isotope, applied to thin substrates of aluminum, aluminum foil and polymer films of a large area, are a promising material for creating new neutron detectors. The application of B4C films by magnetron sputtering on such bases is greatly complicated by the need to heat the substrates to a temperature of 400 °C or more, which can lead to their deformation. It is shown that the use of ion assistance in the process of magnetron deposition of B4C leads to the possibility of forming films of nano-crystalline structure with high strength and flexibility, even when the temperature drops to 50 °C, and the use of an Al sublayer increases adhesion. B4C thin films were obtained on 0.5 × 100 × 100 mm2 and 0.5 × 280 × 400 mm2 aluminum substrates in an argon atmosphere at temperatures of 400, 200 and 50 °C. The structure, composition and refractive index of films on silicon wafers are studied. The flexibility of the resulting films and the low formation temperature make it possible to create neutron converters from 10B4C on thin polymer bases.


Разработка: студия Green Art