Obtaining of Titanium Powder from Titanium Sponge by Self-Propagating High-Temperature Synthesis Hydration and Dehydration

摘要

The experimental data of investigations of obtaining titanium powder from titanium sponge by self-propagating high-temperature synthesis (SHS) hydration and its subsequent dehydration are presented. The properties of dehydrated titanium obtained under optimal conditions are investigated. It is shown that, compared with its analogs, dehydrated titanium contains fewer impurities. The shape of its particles is molten comminuted with nanodimensional structural elements in the form of cracks, channels, incrustations, and layers with dimensions of 100--500 nm. Prolonged milling of starting titanium hydride to micrometer sizes does not affect the surface morphology of nanostructured particles and leads to the contamination of the final dehydrated titanium. The dispersity of the latter varies depending on the sponge sizes (-10 + 2 mm) to 20 urn. The results of a refined calculation of the prime cost of SHS of titanium hydride and dehydrated titanium are presented.