In this work, a layered composite material based on TiB/30 wt.% Ti on a Ti6Al4V titanium alloy was obtained by free SHS compression. Powders of titanium and amorphous black boron were used as initial components. The structural features, phase composition, porosity and distribution of microhardness along the height of the layered material were studied. It was shown that, as a result of synthesis and subsequent high-temperature deformation, the following phases were formed in the layered composite material: TiB, TiB2, Ti0, 76N. It was found that at a compression pressure of 50 MPa a layered composite material with a porosity of up to 1-2% is formed. It was found that the delay time before applying pressure affects the size of the diffusion zone in the range of 10-50 microns. Due to the formation of hardening phases in the composite material on Ti6Al4V, the microhardness of its surface increased from 2.4 to 11 GPa.
Compact ceramic materials based on the Ti‒B system modified with 5 wt. % of nanosized Si3N4 particles. The results of studies of the structure, phase composition, and physical and mechanical characteristics of the materials obtained are presented. It is shown that the addition of Si3N4 promotes the formation of new phases, in particular, titanium diboride and nitride in the final product. It was found that the introduction of modifying nanosized Si3N4 particles into the initial charge leads to an increase in hardness and microhardness by 15‒20 %, as well as to an increase in crack resistance by 1,5 times in comparison with unmodified samples.
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