Synthesis, Structure, and Hydrogen-Sorption Properties of .sub.4Ni.sub.2N.sub.x Subnitrides

We synthesize a series of new (Ti, Zr).sub.4Ni.sub.2N.sub.0.5-1.0 subnitrides with Fe.sub.3W.sub.3C-type structure (space group Fd -3m, Z = 16, and the Pearson symbol cF112). Their hydrogen-sorption properties are investigated (both from the gas phase and electrochemically). It is shown that the all...

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Published inMaterials science (New York, N.Y.) Vol. 53; no. 3; p. 306
Main Authors Zavalii, Ð. Yu, Verbovyts'kyi, Yu. V, Berezovets', V. V, Shtender, V. V, Pecharsky, V. K, Lyutyi, P. Ya
Format Journal Article
LanguageEnglish
Published Springer 01.11.2017
Subjects
Alloys
Analysis
Hydrogen
Nitrides
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Summary:We synthesize a series of new (Ti, Zr).sub.4Ni.sub.2N.sub.0.5-1.0 subnitrides with Fe.sub.3W.sub.3C-type structure (space group Fd -3m, Z = 16, and the Pearson symbol cF112). Their hydrogen-sorption properties are investigated (both from the gas phase and electrochemically). It is shown that the alloys may absorb up to 2.5 wt.% hydrogen. The maximum discharge capacitance is detected for Ti.sub.4Ni.sub.2N.sub.0.5. Three new hydrides (Ti.sub.4Ni.sub.2N.sub.0.5H.sub.6.9, Ti.sub.2Zr.sub.2Ni.sub.2NH.sub.7.4, and TiZr.sub.3Ni.sub.2N.sub.0.5H.sub.11) are synthesized and their structures are investigated. These nitrides preserve the structure of the original matrix with the volume of the lattice increased up to 18%.
ISSN:1068-820X
DOI:10.1007/s11003-017-0076-9