Chemical Composition and Structure of the Tini Alloy Surface Layer Formed after Electron-Beam Melting and Crystallization

This paper presents the results of the chemical composition and structure of the NiTi surface layer after the single and ten-fold electron-beam treatment. Auger electron spectroscopy reveals that the electron-beam treatment of the NiTi surface layer results in its enrichment with carbon and oxygen and much greater depth extension than the thickness of the natural oxide layer of NiTi. Transmission electron microscopy shows the multilayer structure of the surface layer formed due to melting and crystallization.