Nb-Pd-Ti BCC thin films for hydrogen separation

Date

2019-02-15

Author

Piskin, Fatih
Öztürk, Tayfur

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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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Citation Formats

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.