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Nb-Pd-Ti BCC thin films for hydrogen separation
Date
2019-02-15
Author
Piskin, Fatih
Öztürk, Tayfur
Metadata
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An investigation was carried out into Nb-Pd-Ti ternary system to determine possible body-centered cubic (b.c.c.) membranes that can be used for hydrogen separation. A library of thin films was produced covering the greater portion of Nb-Pd-Ti ternary diagram using a combinatorial approach. The library was screened both structurally and in terms of a reactivity index defined as the ratio of the resistivity measured in the films under hydrogen and argon. The study showed that a substantial portion of compositional field stretching from Nb to Ti yield thin films with b.c.c. structure. The evaluation based on the reactivity index showed a narrow region close to Nb corner as possible compositions for separation membranes. The b.c.c. field was also screened with regard to the lattice volume so as to identify regions of acceptable hydrogen solubility. The superposition of two maps; one reactivity index and the other lattice volume yield a field 32 < Nb <41, 27 < Pd <44, 20 < Ti <38 as possible compositions for separation membranes.
Subject Keywords
Hydrogen separation
,
Combinatorial approach
,
Resistivity
,
Lattice volume
URI
https://hdl.handle.net/11511/30471
Journal
JOURNAL OF ALLOYS AND COMPOUNDS
DOI
https://doi.org/10.1016/j.jallcom.2018.10.126
Collections
Graduate School of Natural and Applied Sciences, Article
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F. Piskin and T. Öztürk, “Nb-Pd-Ti BCC thin films for hydrogen separation,”
JOURNAL OF ALLOYS AND COMPOUNDS
, pp. 411–418, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30471.