Nanoindentation of palladium-hydrogen

作者：Wheeler J M^*; Clyne T W

来源：International Journal of Hydrogen Energy, 2012, 37(19): 14315-14322.

DOI：10.1016/j.ijhydene.2012.07.054

• Nanoindentation
• Palladium
• Hydrogen storage
• Phase transformation
• Metal hydrides

Nanoindentation has been utilised to track the mechanical effects of hydrogen on palladium foils over a range of hydrogen concentrations. The miscibility gap in the palladium-hydrogen system yields discrete phases over a range of compositions. It is shown that nanoindentation can measure the extent of hydrogen-induced phase transformations across the film thickness after hydrogen removal, with the alpha -> beta -> alpha phase transformations yielding a similar to 50% increase in local hardness. Interstitial hydrogen was observed to promote work hardening in beta phase regions, and a similar to 75% increase in hardness was observed in regions where the alpha phase was saturated with hydrogen.

• 出版日期2012-10