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Since 1994, the Ukrainian Phase Diagrams and Thermodynamics Commission has been a part of the Alloy Phase Diagram International Commission (APDIC), in which 18 representatives from 26 countries of the world participate in its activities. The exchange of scientific information and coordination of activities of the international scientific community, mainly in the field of phase diagrams and thermodynamics, promoting the application of phase diagrams in industry and fundamental science, and dissemination of the methodology of critical evaluation of scientific information in world science are among the priority tasks of the APDIC's activity. As part of the annual report of the Ukrainian Commission, at the APDIC meeting on June 30, 2023, information was presented on the results of the activities of Ukrainian scientists in this field in 2022. It is presented in the form of a table with data on the studied systems and obtained results and a list of references to published papers. Scientists from the Frantsevich Institute for Problems of Materials Science (National Academy of Sciences of Ukraine, Kyiv), Taras Shevchenko National University of Kyiv (Ministry of Education and Science of Ukraine, Kyiv), and Donbas State Engineering Academy (Ministry of Education and Science of Ukraine, Kramatorsk) provided relevant information to the Ukrainian Commission. [ABSTRACT FROM AUTHOR]

The Ukrainian Phase Diagrams and Thermodynamics Commission has been a member of the Alloy Phase Diagram International Commission (APDIC) for almost thirty years (since 1994). APDIC unites 18 member organizations involving 26 countries. The main tasks of APDIC are the exchange of scientific information and coordination of the activities of the international scientific community, mainly in the field of state diagrams and phase thermodynamics. The annual report of the Ukrainian Commission on the results of the activities of Ukrainian scientists in this field in 2021 was presented at the APDIC meeting on May 27, 2022. This information is presented in a table, collecting data on the systems studied and the result obtained and containing a list of references to published papers. Scientists from the Frantsevich Institute for Problems of Materials Science (National Academy of Sciences of Ukraine, Kyiv), Taras Shevchenko National University of Kyiv (Ministry of Education and Science of Ukraine, Kyiv), and Donbas State Engineering Academy (Ministry of Education and Science of Ukraine, Kramatorsk) provided relevant information to the Ukrainian Commission. [ABSTRACT FROM AUTHOR]

The melting diagram and reaction scheme (Scheil diagram) of the Al–Ti–Pt system have been constructed for the first time in the composition range 0–50 at.% Pt using the experimental results for as-cast alloys and alloys annealed at subsolidus temperatures. It is established that ternary compounds τ3, τ4, and τ8 form congruently with participation of the liquid phase and compounds τ1, τ2, τ5, τ6, τ7, τ9, and τ11 by peritectic reactions. All compounds take part in phase equilibria with participation of the liquid phase, forming 31 four-phase and 28 three-phase invariant equilibria at temperatures from 1410 to 660°C. [ABSTRACT FROM AUTHOR]