Malykhin S. Formation mechanisms and evolution processes of structure, stress state, and properties changes in quasi-and nanocrystalline metal films under external factors

Object: physical phenomena, and thin metal film structure and stress state mechanisms of formation and evolution. Objective: establishment of general regularities for formation and evolution mechanisms of phase composition, structure, stress state and properties of metal nano- and quasi-crystalline films prepared under extreme conditions. Methods: X-ray diffraction, X-ray fluorescent spectroscopy, electron micro-probe analysis, Auger- spectroscopy, transmission electron microscopy, scanning electron microscopy, nano-indentation. Results: It is established that thin crystalline films and quasi-crystalline ribbons possess gradient depth distribution of the structure, substructure, stress state and property parameters. For Ti-Zr-Ni ribbons, the preparation regimes for icosahedral quasicrystalline single- or overwhelming phase samples have been defined. The stability ranges were determined, and thermo-physical and mechanical properties were studied. The conclusion was made on isotropy of Young modulus, linear expansion coefficient and Debye temperature. Stimulated chemical reactions and structure, stress state, and property changes of crystals and quasi-crystals under ion, VUV and X-ray irradiation, and under hydrogen saturation were investigated. Application areas: physics of solids, atomic engineering, space material science.