The paper presents the characteristics of the surface layer of d-elements of the IV group (titanium, zirconium and hafnium) after thermal diffusion saturation from a controlled oxygen-containing gas medium. Saturation was carried out at T = 750 °C for t = 5 hours at different pressures (P = 1.33∙10–1 Pa, P = 1.33∙10–2 Pa, P = 1.33∙10–3 Pa). Experimentally revealed differences in the characteristics of the surface layer of titanium, zirconium and hafnium.
The phase composition and structure of powders of titanium sponge exposed to processes of chemical and thermal processing is investigated.
As a result of X-ray analysis, it is found that after hydrogenation titanium powder consists of TiH2±х phase, while with the increase in the degree of phase dehydrogenation the percentage of TiH2±х decreases, and under perfect the dehydrogenation the structure consists mainly of α-Ti. Particle size analysis revealed that the partially dehydrated powders have the least degree of polydispersity.