TiMn2-Based Intermetallic Alloys for Hydrogen Accumulation: Problems and Prospects

Abstract

the main advantages of hydrogen as an energy carrier in comparison with currently used hydrocarbons are determined. By comparing the advantages and disadvantages of available methods of hydrogen storage, it was proved that storage of it in a bound state (hydrides) provides the largest amount of stored hydrogen per unit weight of the container and is the safest method. As shown, the alloys based on AB 2type intermetallics are the most promising materials for safe storage and transportation of hydrogen in the bound state.

Structure, Phase Composition, and Hydrogen Absorption Properties of Multiphase Alloys of Ti–Zr–Mn–V System Alloyed with Holmium

“…As seen from Figure 4, the process of hydrogen absorption for all alloys at elevated temperatures has a similar nature and consists of two stages with noticeably different rates of interaction. The data of [4,10] allow to suggest that the first stage of interaction with hydrogen corresponds to the formation of a supersaturated solid solution, whereas the second is the formation of the hydride phase.…”

“…It has now been shown that storing hydrogen in a bound state (metal hydrides) is a more cost-effective and safe way than in liquid or gaseous states [1][2][3][4][5]. Among the existing variety of materials for hydrogen sorption, the AB 2 -type intermetallics (hexagonal Laves phase of C14 type) and multiphase alloys based on them are recently used, especially in transport [6][7][8][9][10]. In this class of materials, an important place is occupied by the Ti-based alloys.…”

“…solid solution, the elements from the same period (zirconium and hafnium) or group (from vanadium to nickel) of titanium in the periodic table. However, these elements, except zirconium, vanadium, and chromium, have low affinity for hydrogen or do not react with it at all [10]. In addition, the elements of the same group with titanium with higher atomic number have smaller atomic radii [18].…”

Hydrogen Absorption and Desorption by Niobium and Tantalum

“…Influence on the phase composition and physical and mechanical characteristics of metallic materials through their interaction with hydrogen is the basis of many technologies. In particular, the temporary saturation of metals and alloys with hydrogen provides an effect on the defects of their crystal structure, phase composition and microstructure (so-called hydrogen treatment) [1,2], which is used to achieve the desired mechanical properties. Metal hydrides are brittle and rather low-strength materials compared to the source materials [3,4].…”

“…In addition to the above, modern developments in the field of hydrogen energy are important, which require detailed knowledge of the kinetics of the processes of inverse saturation of materials with hydrogen for the development of hydrogen batteries [2,[23][24][25]. That is why the conditions of interaction of various metals and alloys with hydrogen, including thermal, pressure and time parameters of hydrogen saturation and the reverse process of hydrogen evolution from metals, are extremely important data for basic knowledge and applied developments.…”