A.B. Markov

Tomsk Scientific Centre of the SB RAS

This work focuses on the application of pulsed electron beams (PEB) in scientific research relating to the surface modification of materials. PEB has several key features, including the ability to melt materials by pulses and subsequently homogenise thin surface layers. Another useful feature is surface smoothing, also known as electron-beam polishing. PEB can also be used to form highly adhesive coatings known as surface alloys. However, an additional preliminary operation is required for this: the deposition of films with a specific chemical composition. During this process, the PEB acts as a mixer, combining heterogeneous molten layers. In this capacity, PEB can be considered as a tool for additive micro-scale technologies. One notable example of an electron-beam machine is the 'RITM-SP', which has a low-energy, high-current source with the following parameters: a pulse duration of 2–3 μs; an electron energy of up to 30 keV; a current density of up to 200 A/cm²; and a beam diameter of up to 100 mm.
The potential for using PEB in industrial applications is also discussed. It could enhance the chemical, mechanical and electrical properties of metal products. Notably, it has the potential to be used in the electrical industry to increase the level of breakdown electric fields. Consequently, PEB is being considered for processing electrodes and parts of electrodynamic structures. Another potential application is in the medical industry, where it could be used to form protective layers that prevent toxic atoms from implants being released into surrounding body tissues.