Obtaining of Materials-Getters Based on Intermetallides by Electro-Pulse Sintering of Titanium Sponge with Aluminum and Niobium Powders

摘要

It has been proposed to use a titanium sponge to obtain materials-getters containing intermetallides byelectro-pulse sintering. Techniques and equipment for electro-pulse sintering of powders and producingmaterials-getters containing intermetallides of the Ti–Al–Nb system are explained in this work.Techniques and equipment for determining the structural-phase composition, permeability, strength andgetter properties of porous samples are described. The research results of the properties of samplesproduced by electro-pulse sintering of a charge consisting of powders of a titanium sponge with additionsof aluminum and niobium in its composition in different combinations are presented. It has beenestablished that the samples under investigation have porosity in the range of 44-46 %, an average poresize in the range of 120-130 μm, and strength in the range of 120-125 MPa. It has been shown thatmaterials made of titanium-based charge with 27-28 % of aluminum content are titanium α-alloys, andmaterials made of titanium-based charge with 27-28 % of aluminum content and 3.5-4.4 % of niobiumcontent are α-β-alloys with inclusions of intermetallides of Ti3Al (28 %) and TiAl (65 %) systems. Samplescontaining additional intermetallides of Ti3Al–TiAl–AlNb system are made of titanium-based charge withthe content of 27-28 % of aluminum and 9.5-10.4 % of niobium. It has been established that theintroduction of 27-28 % of aluminum into the charge based on sponge titanium powder improves thesorption volume of the produced materials by 1.8-2.0 times, and the introduction of niobium in its contentin the amounts of 3.5-4.4 % and 9.5-10.4 % increases the sorption volume in 4,0-4,2 and 5,4-5,6 times,respectively. It has been proposed to use produced materials-getters made of intermetallide alloys,made of titanium sponge powders with inclusions of aluminum and niobium, in the production of fuelelements of hydrogen economy.