Взаимодействие атомов Be с поверхностью грани (111) Ir

It is shown that, when sputtered onto the surface of the (111) Ir face in the temperature range 1100–1250 K, beryllium atoms form a surface chemical compound of stoichiometry Ir3Be with a concentration of adsorbed beryllium NBe=5•1014 cm–2, after which the newly deposited beryllium atoms dissolve in the volume of the metal . The Ir3Be surface compound itself is destroyed due to the dissolution of beryllium in the temperature range of 1250–1400 K with an activation energy increasing from 3.2 eV to 3.7 eV with decreasing Be concentration. At T>1400 K, the thermal desorption channel is switched on. The formation of the Ir3Be surface compound significantly lowers the energy barrier E for the dissolution of Be atoms in the bulk of iridium by Δ E>1.7 eV.