Hydrogen atoms in metal alloys observed for first time by Australian scientists

Australian scientists have directly observed hydrogen atoms inside metal alloys' crystal lattice for the first time, explaining the mechanism of hydrogen embrittlement and aiding the development of reliable hydrogen equipment. The University of Sydney team, led by Professor Julie Cairney, used cryogenic atom probe tomography and replaced hydrogen with deuterium to track the atoms. Published in Nature, the study confirmed hydrogen dissolves in interstitial spaces, with the chemical composition and configuration of neighboring metal atoms determining concentration sites. Previously, hydrogen in metals was only detected as hydride compounds or in microdefects. Lead author Dr. Chao Huang says the findings, which took years to achieve, now support developing ultra-strong hydrogen-resistant steels for safer clean energy infrastructure.