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Information × Registration Number 0220U000154, 0119U000547 , R & D reports Title Principles of obtaining materials in microgravity conditions (Stage 2 "The modeling of permanent and cyclic effects on composite and single-crystal materials in microgravity conditions") popup.stage_title Head Fedorov Oleg Pavlovich, Registration Date 20-01-2020 Organization Space Research Institute of National Academy of Sciences of Ukraine and State Space Agency of Ukraine popup.description2 The research objects are: the solidification process in the binary two-phase systems, the strain-sensitive electrically conductive materials. The methods of research are: numerical calculations, mathematical and experimental physics, macromolecular chemistry. The research results are: 1) A mathematical model has been developed to study the problem of the crystallization front stability taking into account the simultaneous influence of many factors, including the suction effect caused by the density jump at the boundary of the phase transformation. It is established that the melt inflow, which is caused by its compaction upon the hardening, together with the latent heat of melting, leads to an increase of the instability in the region of the short-wave perturbation spectrum of the phase transition boundary. 2) A new piezoresistive hybrid material which deformation sensitivity significantly exceeds its analogues known in the literature has been developed. It is shown that in similar hybrid materials even small mechanical deformations (up to 2%) cause a huge, proportional to the deformation, change in current (up to 2000%). Application for the invention of polymeric sensor material "Piezosensor", sensitive to low intensity loads has been made. Product Description popup.authors Клименко Ю.О. Машковський А.Г. Федоров О.П. popup.nrat_date 2020-04-02 Close