Synthesis of Ultra-Dispersed Spherical Composite Materials

Abstract

This paper describes a method of laser synthesis of titanium microspheres, titanium carbide and silicon oxide. The formation of microspheres is carried out under the action of femtosecond laser radiation on the surface of the sample. The analysis was carried out on a scanning electron microscope. The obtained titanium and titanium carbide microspheres have an average size of the main fraction of 1-3 μm and can be used in applications of additive technologies and powder metallurgy as the main raw material or as an alloying additive. The main fraction of silicon oxide granules lies in the range of 50-300 nm. To improve the efficiency of the particle output, a combined method of laser action and electric current is proposed.

Investigation of material heating under the action of ultrashort laser pulses

“…Currently, the process of laser ablation of materials when exposed to ultrashort pulses is of great scientific and practical interest [1][2][3]. In the process of laser ablation processing, including in liquid media, it is possible not only to process the surface of materials, but also to synthesize nanoscale materials with predictable dispersion [4,5].…”

“…Ablative laser synthesis of nanoparticles makes it possible to obtain spherical granules with a narrow granulometric composition [1,3,11]. However, this method also has a number of disadvantages, namely, the synthesized particles can have traces of fusion, together with the main material at the outlet, traces of "splashes" can be observing, and there can be pronouncing traces of the presence of a melt pool [12][13][14][15].…”

Deflection of particles of a laser erosion plume under the action of a high-voltage electrostatic field during ablation processing of titanium

“…An effective method of combined action in the tasks of laser processing of materials is the use of an electric field [6][7][8]. The electric field can facilitate the removal of ablation products from the region of laser beam propagation [9][10][11][12][13][14] or for the formation of an electric arc stabilized by a laser-induced plasma channel (LIPC), which is formed when intense subpicosecond laser pulses pass through the medium in the caustic region of the laser beam [15,16] The use of combined exposure when performing various types of material processing, including the use of laser radiation, is a common practice [17,18]. Usually, laser radiation acts as the main physical impact, additional impacts greatly contribute to an increase in the processing efficiency.…”