The synthesis of intermetallic material was carried out by means of dehydrogenating annealing of a (TiH 2) 30 Zr 45 Ni 25 sample in vacuum by an electron beam. The properties of the obtained material were studied for establishing the structural phase composition by scanning electron microscopy and X-ray structural analysis. It was found that prolonged exposure of an electron beam to a sample containing titanium hydride leads to a number of structural transformations in the material, accompanied by a redistribution of hydrogen from titanium to zirconium and culminating in the synthesis of a ternary alloy with characteristic growth structures. The processes of hydrogen sorption-desorption by a synthesized sample were studied, the temperature ranges of these processes and the absorption capacity of the obtained material were established. It was shown that the structure of the sample formed upon heating by an electron beam promotes the absorption of hydrogen at room temperature up to 1.41 wt.%.
198
ISSN 1562-6016. ВАНТ. 2020. №1(125)
UDC 544.723; 669.788
SYNTHESIS OF HYDROGEN STORAGE MATERIALS IN A Ti-Zr-Ni
SYSTEM USING THE HYDRIDE CYCLE TECHNOLOGY DURING
DEHYDROGENATION BY AN ELECTRON BEAM IN A VACUUM
O.E. Dmytrenko, V.I. Dubinko, V.M. Borysenko, K. Irwin*
National Science Center “Kharkоv Institute of Physics and Technology”, Kharkiv, Ukraine;
*Quantum Gravity Research, Los Angeles, CA
E-mail: dmitrenko@kipt.kharkov.ua
The synthesis of intermetallic material was carried out by means of dehydrogenating annealing of a
(TiH2)30Zr45Ni25 sample in vacuum by an electron beam. The properties of the obtained material were studied for
establishing the structural phase composition by scanning electron microscopy and X-ray structural analysis. It was
found that prolonged exposure of an electron beam to a sample containing titanium hydride leads to a number of
structural transformations in the material, accompanied by a redistribution of hydrogen from titanium to zirconium
and culminating in the synthesis of a ternary alloy with characteristic growth structures. The processes of hydrogen
sorption-desorption by a synthesized sample were studied, the temperature ranges of these processes and the
absorption capacity of the obtained material were established. It was shown that the structure of the sample formed
upon heating by an electron beam promotes the absorption of hydrogen at room temperature up to 1.41 wt.%.
INTRODUCTION
The
possibility
of
synthesizing
complex
intermetallic and quasicrystalline materials based on
refractory metals of the zirconium group using hydride
technology was shown in [1–8]. These materials are
capable of reversibly absorbing hydrogen in significant
quantities over 2 wt.% [9–11], which allows us to
consider them as materials for the storage of hydrogen.
The studies conducted earlier [12, 13] showed that
materials of the Ti-Zr-Ni system obtained by the rapid
quenching method and containing the Laves phase C14
(L-TiZrNi) abso