The formation of nanowhiskers in syntactic foam containing tungsten under nanosecond flow of relativistic electrons

The results of experimental studies of the nanowhiskers formation under the influence of relativistic electron beams of nanosecond duration on syntactic foam containing tungsten are presented. We demonstrated effects which observed after a single impact of relativistic electron beams with a flux density of 230-240 J/cm 2 and a total pulse duration of 150 ns. The spheres with diameter of more than 40 µm are destroyed in irradiated syntactic foam. Filamental structure is formed on the surface of such spheres. Its length is up to 10 µm and a diameter of about 100 nm. The complex kinetics substance expansion from the irradiated surface was found out. The speeds of gas-plasma formations expansion reached ~ 13 km/s. It was found that nanowhiskers are not formed near the emission “crater” from syntactic foam, where the duration of the mechanical pressure pulse is minimal and close to the duration of the relativistic electron beam impact.