Zoya Duriagina1, Andriy Trostyanchyn1, Ihor Lemishka1,
Andriy Skrebtsov2, Oleksandr Ovchinnikov2
1Lviv Polytechnic National University, Lviv, Ukraine
2Zaporizhzhia National Technical University, Zaporizhzhia, Ukraine
THE INFLUENCE OF CHEMICAL-THERMAL TREATMENT
ON GRANULOMETRIC CHARACTERISTICS
OF TITANIUM SPONGE POWDER
Received: December 1, 2016 / Revised: February 8, 2017 / Accepted: June 26, 2017
© Duriagina Z., Trostyanchyn A., Lemishka I., Skrebtsov A., Ovchinnikov O., 2017
Abstract. 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.
It is established that by means of regulation of technological regimes of hydrogenation-dehydrogenation the two-phase structure with different ratios of α-phase to TiH2±х can be synthesized.
It is shown that the presence of titanium hydride contributes to stabilization of the structure of formed powders.
Keywords: structure, titanium, phase hydride, granulometric characteristics, properties, powder.

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