SIMS Study of Hydrogen Interaction with the LaNi₅ Alloy Surface

The results obtained by the method of secondary ion mass spectrometry study of the initial stages of hydrogen interaction with the LaNi₅ alloy surface are presented. It is demonstrated that the alloy surface is partially covered with a layer of island-structure oxides. Upon impinging on clean surface regions, hydrogen forms chemical compounds with both (nickel and lanthanum) alloy components. When the amount of hydrogen increases, hydride structures with different stoichiometric compositions involving both alloy components are formed on the surface and in the near-surface region.