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Information × Registration Number 0219U001801, 0118U003423 , R & D reports Title Methods of constructing of phase composition and structure of composition radiоprotectiv materials are on the basis of carbide of the boron and refractory compound of metals popup.stage_title Head MaKara Vladimir, Registration Date 01-03-2019 Organization The scientific and traning center "Physical and chemical material science" of the National Academy of Sciences of Ukraine. popup.description2 A complex theoretical-experimental and thermodynamic analysis of processes occurring during the reaction synthesis of ceramic composite materials on the basis of boron carbide and borides or transition metal oxides (aluminum, titanium, hafnium, chromium) has been carried out. The theoretical model for calculating the crack resistance and fracture energy of a brittle composite material of the matrix inclusion type is proposed, taking into account the bending of the front of the crack between the obstacles before the final destruction of the material.he durability and fracture resistance of ceramic materials made in different ways have been analyzed. The advantages of low temperature reaction synthesis are shown for obtaining high-density refractory ceramic materials with an ultra-microdisperse structure, which determines the increased mechanical properties. To do this, one must create one of the two composite structures based on the strengthening of the fine ceramic matrix by introducing it into it: 1) as many larger (> 30 microns) high-modulus inclusions as possible, or 2) 10-15 percent by volume of soft inclusions of 0.3 - 1 ?m. The achievement of the specified structural parameters will double the fracture stability of the matrix phase. Product Description popup.authors Кепич Тіберій Юрійович Руденко Ольга Василівна Чорнобук Сергій Володимирович popup.nrat_date 2020-04-02 Close