Syntheses and properties of several metastable and stable hydrides derived from intermetallic compounds under high hydrogen pressure
Source abstract
Abstract
Abstract Brief summary of our former work on high hydrogen pressure syntheses of novel hydrides and studies of their properties is supplemented with new results. Syntheses and properties of a number of hydrides (unstable, metastable or stable in ambient conditions) derived under high hydrogen pressure from intermetallic compounds, like MeT 2 , MeNi 5 , Me 7 T 3 , Y 6 Mn 23 and YMn 12 (where Me = zirconium, yttrium or rare earth; T = transition metal) are presented. Stabilization of ZrFe 2 H 4 due to surface phenomena was revealed. Unusual role of manganese in hydride forming processes is pointed out. Hydrogen induced phase transitions, suppression of magnetism, antiferromagnetic-ferromagnetic and metal-insulator or semimetal-metal transitions are described. Equations of state (EOS) of hydrides submitted to hydrostatic pressures up to 30 GPa are presented and discussed.
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Research context
OpenAlex topics: Hydrogen Storage and Materials · Advanced Chemical Physics Studies · High-pressure geophysics and materials
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