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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session I
MM 18.38: Poster
Montag, 16. März 2020, 18:15–20:00, P4
Investigation of Hydrogen Isotopologue Sorption in Ti/Pd Films — •Sonja Schneidewind1, Sebastian Vetter1, Christian Goffing1, Max Aker1, Marco Langer3, Andreas Fleischmann2, Loredana Gastaldo2, Andreas Reifenberger2, and Magnus Schlösser1 — 1IKP, KIT, Karlsruhe, Germany — 2Kirchhoff-Institute for Physics, Heidelberg, Germany — 3ITEP, KIT, Karlsruhe, Germany
Certain metals can solve hydrogen isotopes in their lattice structure and can subsequently form metal hydrides. Out of these materials, Ti has one of the lowest dissociation pressures which allows for quasi-irreversible hydrogen isotope capture. However, the Ti surface tends to form an oxide layer in air which acts as effective permeation barrier. The oxidation can be prevented by a thin Pd film on top allowing for gas permeation through the Pd layer into the Ti getter. This technique can be used to build effective passive hydrogen isotopologue pumps or by employing the radioactive isotopologue, tritium, one can build dedicated radioisotope heat sources, e.g. for calibration purposes.
We perform sorption experiments by using a quartz crystal micro balance with nanogram resolution to determine the dependence of absorbed gas amount and durability of absorbed gas in Ti/Pd films on loading parameters. Films coated on QCMs are exposed to hydrogen isotopologue gas. XRD and resistance measurements are used to study phase transformations and to verify the absorbed gas amount. The sorption of tritium by the films is investigated by Beta-Induced X-Ray Spectrometry combined with simulations using GEANT4.