Thermochemical Analysis of Hydrogenation of Pd-Containing Composite Based on TiZrVNbTa High-Entropy Alloy
Source abstract
Abstract
The microcalorimetric hydrogen titration technique combined with conventional volumetric measurements has been used to reveal peculiarities of the hydrogenation of the single-phase TiZrVNbTa equiatomic high-entropy alloy. The alloy has been produced in the form of microfibers by the pendent drop melt extraction technique. Palladium coating of the fibers has been applied to enable first hydrogenation at room temperature without additional activation. An analysis of the obtained data allows us to evaluate the dependence of hydrogenation enthalpy on the hydrogen concentration in the alloy. Three concentration ranges, presumably related to the formation of the hydrogen solid solution, monohydride and dihydride phases, have been identified, and the corresponding ΔH values of about −100, −80 and −60 kJ/mol H2, respectively, have been determined.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Hydrogen Storage and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
Accelerated Particle Laboratory, National University of Science and Technology MISIS, Leninskiy Prospekt 4, 119049 Moscow, Russia
Center for Project Activities, Moscow Polytechnic University, Bolshaya Semenovskaya St., 2, 107023 Moscow, Russia
Moscow Aviation Institute, National Research University, 119049 Moscow, Russia
Funding
Ministry of Science and Higher Education of the Russian Federation · Competitiveness Improvement Program of NUST MISIS · Moscow Polytechnic University within the framework of the grant named after Pyotr Kapitsa
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