Berlin 2008 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 40: SYM Hydrogen in Materials: New Developments IV
MM 40.4: Vortrag
Donnerstag, 28. Februar 2008, 17:40–18:00, H 1058
Opto-mechanical high-throughput characterization of composition spread thin films for the development of new hydrogen storage materials — •Alfred Ludwig1, 2, Jialin Cao2, Alan Savan2, Michael Ehmann2, and Hans-Werner Becker3 — 1Institut für Werkstoffe, Ruhr-Universität Bochum — 2Combinatorial Materials Science, caesar, Bonn — 3Institut für Physik mit Ionenstrahlen, DTL Labor, Ruhr-Universität Bochum
An opto-mechanical high-throughput characterization method was used for the investigation of hydrogen storage materials within the system Mg-B-Ti-Pd. The materials were deposited by magnetron sputtering in form of thin film composition spreads on micromachined Si cantilever arrays. The thin films were characterized by EDX and XRD prior and after hydrogen loading. In a special pressure vessel, the mechanical stress-changes of the coated cantilevers as a function of hydrogen pressure (0.1 to 5.1 MPa) and temperature (20 to 450°C) was measured in parallel using the optical technique. These stress-changes are related to the hydrogen uptake/release of the different materials. The most promising thin films which showed hydrogen storage were further analyzed by RBS and NRA. The latter was used to determine the hydrogen content of the thin films and its depth distribution.