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Information × Registration Number 0205U006868, 0103U006900 , R & D reports Title Temperature anomalies investigation of physical properties of metals with HCP lattice and ratio c/a < 1,60 with the purpose to find their physical nature popup.stage_title Head Kulish Nikolay Polikarpovich, Доктор фізико-математичних наук Registration Date 22-12-2005 Organization Taras Shevchenko Kiev university popup.description2 The motion equations for a crystal lattice of strongly anharmonic crystals was investigated using the Green's function method. The influence of lattice vibrations anharmonicity to be reduced to renormalization of force constants that results in their dependence on temperature. It is established, that anisotropy of frequencies of lattice vibrations results in anisotropy of diffusion factor. For crystals with a ratio of the periods of a crystal lattice c/a 1,63 the anisotropy of diffusion factors leads to decrease of temperature, at which begins a high-temperature (that is supervised by diffusion of vacancies) mechanism of deformation. Product Description popup.authors popup.nrat_date 2020-04-02 Close