A comprehensive study of the technical parameters and conditions for the synthesis of ternary alloys in the Ti-Zr-Ni system by the “hydride cycle” method was carried out. The influence on the synthesis process of such parameters as: temperature and annealing time, heating rate, cooling conditions, material composition, dispersion, hydrogen content in the hydrides used, the presence of impurities, mixing and pressing methods, and the degree of pressing of the starting components was determined. The alloys of the following compositions were synthesized and investigated: Ti40.5Zr31.9Ni27.6, Ti41.5Zr41.5Ni17, Ti40Zr40Ni20 , Ti44Zr40Ni16. The optimal technological parameters and conditions for the synthesis of ternary alloys are determined. It has been established that the key factors in the process of compound formation during hydride dissociation are the dispersion and homogeneity of the initial compacted components. It was found that the synthesis of ternary alloys in the Ti-Zr-Ni system occurs during a short-term exothermic reaction in the “thermal explosion” mode, which begins in the temperature region corresponding to the α↔β polymorphic transformation of zirconium and titanium.
ISSN 1562-6016. ВАНТ. 2022. №1(137)
111
https://doi.org/10.46813/2022-137-111
SYNTHESIS OF THE Ti-Zr-Ni ALLOYS BY
THE “HYDRIDE CYCLE” METHOD
O.E. Dmytrenko
1
, I.V. Kolodiy
1
, T.B. Yanko
2
, V.M. Borysenko
1
, K. Irwin
3
, R.L. Vasilenko
1
1
National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine;
2
PJCS “Titanium Institute”, Zaporizhzhya, Ukraine;
3
Quantum Gravity Research, Los Angeles, CA, USA
E-mail: dmitrenko@kipt.kharkov.ua
A comprehensive study of the technical parameters and conditions for the synthesis of ternary alloys in the Ti-
Zr-Ni system by the “hydride cycle” method was carried out. The influence on the synthesis process of such
parameters as: temperature and annealing time, heating rate, cooling conditions, material composition, dispersion,
hydrogen content in the hydrides used, the presence of impurities, mixing and pressing methods, and the degree of
pressing of the starting components was determined. The alloys of the following compositions were synthesized and
investigated: Ti40.5Zr31.9Ni27.6, Ti41.5Zr41.5Ni17, Ti40Zr40Ni20, Ti44Zr40Ni16. The optimal technological parameters and
conditions for the synthesis of ternary alloys are determined. It has been established that the key factors in the
process of compound formation during hydride dissociation are the dispersion and homogeneity of the initial
compacted components. It was found that the synthesis of ternary alloys in the Ti-Zr-Ni system occurs during a
short-term exothermic reaction in the “thermal explosion” mode, which begins in the temperature region
corresponding to the α↔β polymorphic transformation of zirconium and titanium.
PACS: 81.20.-n, 81.40.-z, 71.20.Lp
INTRODUCTION
Most zirconium alloys, including quasicrystalline
(QC) materials and intermetallic compounds based on
the Laves phase C14 L-TiZrNi, are capable of
reversibly absorbing a significant amount of hydrogen
and are promising materials for hydrogen energy.
However, the pr