I. S. Gertsel

In this paper, we present results of a comparative study of the efficiency of fiber and particle reinforcement in titanium-matrix composites subjected to high-speed mechanical loading. The structure–phase composition of the synthesized materials has been studied using synchrotron radiation. The results demonstrate that, in the case of laser processing, the degree of dissolution of reinforcing fiber is lower than that of fine powder particles. This leads to a decrease in the volume fraction of the forming secondary phases, such as TiC and Ti₅Si₃C_x, in the case of SiC fiber, and such as TiB₂ and TiB in the case of boron fiber. The use of fiber in producing titanium-matrix composite coatings has been shown to ensure an increase in the impact resistance of the coating material.

The study investigates the possibility of controlling the structural and phase state of the titanium matrix composite Ti–6Al–4V–B₄C during direct laser deposition. A correlation has been established between the laser processing modes and the microstructure of the composite: variations in energy parameters lead to changes in the concentration of secondary phases (TiB, TiB₂, TiC). In this work, synchrotron radiation was utilized for phase analysis, allowing for the determination of the phase composition of the composite through diffraction patterns. It was demonstrated that increasing the laser energy input affects the microhardness of the material, resulting in a 25% increase. The study also evaluates the efficacy of employing additional substrate heating to regulate the extent of dissolution of the initial ceramic particles within the metallic matrix by varying the laser radiation modes. Phase transformation analysis in the titanium matrix composite was performed using X-ray phase analysis with a synchrotron radiation source.

This paper is devoted to the influence of substrate preheating on the structure of cermet coatings made of TI–6AL–4V alloy reinforced with B₄C particles using direct metal deposition. Coatings with a 15% mass fraction of B₄C were obtained for the first time. It is shown that substrate preheating makes it possible to produce cermet coatings without cracks. In tribological tests, the wear scar volume of the cermet coating decreased by a factor of eight compared to the coating with a 10% mass fraction of B₄C.