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Information × Registration Number 0221U102477, 0118U001054 , R & D reports Title Investigation of phase equilibria in multicomponent refractory Al2O3-TiO2-Ln2O3 oxide systems, where Ln = (Nd, Er, Yb) and Al2O3-ZrO2-CoO and creation of physical and chemical bases of microstructural design of composite materials of functional and structural designation from nanocrystalline powders. popup.stage_title Head Dudnik Olena V., Доктор хімічних наук Registration Date 03-02-2021 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2  Purpose: Investigation of phase relations and construction of elements of phase diagrams of ternary refractory oxide systems Al2O3–TiO2–Ln2O3, where Ln=(Nd,Er,Yb) and Al2O3–ZrO2– CoO; features study of microstructural design of composites from nanocrystalline powders of the ZrO2–Y2O3–CeO2–Al2O3–CoO system for creation of new materials of functional, structural and medical purpose on the basis of ZrO2 and Al2O3; study the influence of ZrO2, Y2O3, HfO2, В2О3 on the physi-cochemical properties of rock melts, glasses and fibers to improve their performance under the influence of aggressive external factors (alkaline and acidic environments, neutron radiation).For the first time, isothermal sections of phase diagrams of the Al2O3–TiO2–Ln2O3 systems (Ln = Nd,Er and Yb) at 1400°С, phase diagrams of binary ZrO2–CoO and ternary system Al2O3–ZrO2–CoO were constructed on the basis of phase equilibria systematic studies. Two three-phase and one quasi-binary eutectics were detected in the Al2O3–ZrO2–CoO system. Constructed phase diagrams are new reference materials necessary for the creation of modern technologies for obtaining materials for structural and functional purposes. For the first time, changes in phase composition, specific surface area and morphology of structural components peculiarities of ultrafine and nanocrystalline powders of the ZrO2-Y2O3-CeO2-Al2O3-CoO system in the process of heating up to 1450 °C were determined. It was found that the formation of CoAl2O4 is accompanied by the reverse phase transformations T-ZrO2→M-ZrO2→T-ZrO2. Resistance to "aging" and mechanical properties of composites were determined. For the first time the effect of ZrO2,Y2O3,HfO2,B2O3 additives on physicochemical characteristics of andesite-basalt melt, fiber formation processes, structure and physicochemical properties of fibers was studied. For the first time, the efficiency of using fibers from rocks modified with B2O3 as a filler for concrete to increase their absorbency relative Product Description popup.authors Ivanytsky Stanislav G Glabay Marina S Goncharenko Maria R Diduk Iryna I Koshelenko Natalia I Krasnikova Kateryna S Lakiza Sergij M Makudera Alina O Marek Irina O Red'ko Victor P Ruban Alexey K Smyrnova-Zamkova Mariia Yu. Tishchenko Yana S Trofimova Tamara P Khomenko Oleksiy I. Chuvashov Yuriy M Yashchenko Olga M popup.nrat_date 2021-02-03 Close