Investigation of oxidation and segregation processes at the surface of titanium nickelide
Sergey BelyaevPhysicotechnical Institute, Urals Branch of the Russian Academy of Sciences, IzhevskФ. З. ГильмутдиновPhysicotechnical Institute, Urals Branch of the Russian Academy of Sciences, IzhevskО. М. КанунниковаPhysicotechnical Institute, Urals Branch of the Russian Academy of Sciences, Izhevsk
ABI
Abstract
The chemical composition of the surface of the equiatomic alloy TiNi was studied using x-ray electron spectroscopy. It is shown that titanium nickelide shows a tendency toward titanium segregation at the free surface. After thermal action in vacuum and in air, the fraction of titanium atoms in the surface layer reaches 98% of the total content of titanium and nickel. Under heat treatment in air an oxidized layer forms at the surface whose main component is TiO2.
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