Speaker
Description
Hydrogen as the smallest atom of all elements requires special care when one wants to detect it. Because of its presence in the background gas of any UHV-system, its capability to propagate in materials by quantum mechanical tunnelling and the presence of clean surfaces during the APT analysis of the nano-sized tips are challenging tasks to address. Especially the quantitative measurement is tricky, when hydrogen concentrations beside that of hydrides are of interest. We designed a strategy to quantitatively determine the hydrogen content in the voltage pulsed – APT. This development will be addressed and verified on multilayer samples. EELS and microstructural changes allow the localisation of hydrides in the TEM. Environmental cells or ETEMs enable to studying the hydride formation in-situ, in the presence of hydrogen gas. This will be demonstrated on the hydriding process in Mg-films.
