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Information × Registration Number 0203U008658, 0102U000900 , R & D reports Title Physicochemical properties of surface layers of ferromagnetical amorfous Fe-based alloys popup.stage_title Head Voloshko Svitlana Mykhajlivna, Registration Date 22-12-2003 Organization National Technical University of Ukraine "Kiev Polytechnic Institute", Mechanical Building Institute, chair Resistance of Materials popup.description2 The physical-chemical condition of the surface and near-surface area of the amorphous ribbons were systematically investigated by the complex of surface-sensitive methods (AES, STM, AFM, RFS, SEMS). Investigated amorphous ribbons were produced by quenching of two- or multycomponent Fe-based melting alloys. General regularity of analyzable elements distribution in surface area at the free and contact sides of the ribbon was observed. The reason of an essential deviation of chemical compositions in near-surface area from a stoichiometrical one, which is characteristic of the bulk of amorphous ribbon were established. The temperature range of crystallization and phase compound of ribbons during different stages of amorphous to crystalline state transition were determined. The thermostimulated surface segregation model was designed. Has been determined, that kinetics of element segregation is concerned with structure-phase modification of the ribbon during crystallization. The surface of ribbon topographydetermines down to depth per nanometers. The polyclusters model of quenching alloys has been verified during investigation. Product Description popup.authors popup.nrat_date 2020-04-02 Close