Electrical Resistivity Change during Hydrogen Charging and Subsequent Heating in Zr–Ni Alloy Glasses

Abstract

To reveal the influence of hydrogenation on the electronic structure, structural modification and crystallization in Zr-based alloy glasses, electrical resistivity measurements are made on Zr₅₀Ni₅₀ and Zr₆₇Ni₃₃ glass ribbons during hydrogen charging in the gas phase and subsequent heating in vacuum. Both glasses manifest characteristic changes in the resistivity and TCR (the temperature-coefficient of resistivity) below 300 K depending on the hydrogen content. These changes are related to a modification of the d-band structures caused by the hydrogenation. The behavior of the resistivity at elevated temperatures is discussed in relation to hydrogen desorption, hydride precipitation and crystallization.