METHOD OF STRENGTHENING TUNGSTEN PLATE SURFACE Russian patent published in 2018 - IPC C23C24/10 C23C26/02 C23C4/123 B82Y30/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the processing and hardening of the surface of a tungsten plate exposed to intense thermal loads, in particular, in fusion installations in which tungsten is used as the material of the first wall and the plates of the diverter. Impact on the surface of the tungsten plate with tungsten nanoparticles, accelerated by an electric field, and the form a tungsten film with a thickness of at least 100 nm on the surface of the tungsten plate. As tungsten nanoparticles, molten tungsten nanoparticles with a size of up to 3 nm are used, accelerated by an electric field to a speed above 10⁴ cm/s. Above-mentioned tungsten particles are produced by ablation of a tungsten target by laser pulses of duration (20–50) ns, with a pulse radiation energy of at least 190 mJ and a laser radiation energy density on a tungsten target of at least 2⋅10⁸ W/cm².

EFFECT: simplified formation of a tungsten film on the surface of a tungsten plate and reducing the likelihood of the formation of microcracks on it when exposed to pulsed thermal loads.

1 cl, 2 dwg, 1 ex