Hydrogen storage properties of ZrMnFe1−xNix (x=0.2, 0.4, 0.5 and 0.6) alloys

摘要: Abstract Hydrogen absorption pressure–composition isotherms have been investigated for the ZrMnFe 1− x Ni ( =0.2, 0.4, 0.5 and 0.6) alloys having C14 type hexagonal structure in temperature pressure ranges 30≤ T ≤100°C 0.1≤ P ≤40 bar using a reduction method. Powder X-ray diffractograms show that lattice constants unit cell volume of decrease with increasing content. The P–C presence single plateau region (α+β) studied it was found slope at any given increase content except , where is to be small due atomic ordering alloy Fe 1:1 molar ratio. desorption 30 50°C hysteresis very small. dependence thermodynamics dissolved hydrogen –H systems range 30–50°C on concentration shown existence α, α+β β phase regions as seen isotherms. powder hydrides these do not undergo structural transformation upon hydrogenation. In kinetics during activation after several cycles 30°C compared.