Registration Number
0221U105813,
0120U104793
, R & D reports
Title
Thermodynamics of melts and phase transformations in multicomponent systems of transition metals as a scientific basis for the development of amorphous alloys.
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Head
Turchanin Mykhailo A., Доктор хімічних наук
Registration Date
02-09-2021
Organization
Donbass State Engineering Academy
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Subjects of investigations: melts of the Co–Ni–Ti, Co–Ti–Zr and Co–Cu–Hf systems, thermodynamic properties of phases and phase equilibria of the Co–Ti and Co–Hf systems. Objectives: experimental study of the enthalpies of mixing of liquid Co–Ti–Zr and Co–Cu–Hf alloys; description of the concentration dependence of the enthalpy of mixing of Co–Ti–Zr and Co–Cu–Hf melts within mathematical models; to describe the temperature-concentration dependence of thermodynamic properties of melts of Co–Ni–Ti and Co–Ti–Zr systems within the framework of the associated solution model; development of a thermodynamic assessment of the Co–Ti system and calculate its phase diagram; preparation a dataset for assessment of Co–Hf system within the framework of CALPHAD-method. Research methods: high-temperature isoperibolic calorimetry, mathematical models of thermodynamic properties of melts; associated solution model, CALPHAD-method. Results: the enthalpies of mixing were experimentally investigated, the parameters of polynomial models describing partial enthalpies of mixing were determined, and the parameters of the Redlich-Kister-Muggianu model describing the integral enthalpy of mixing in the Co–Ti–Zr and Co–Cu–Hf melts at 1873 K were determined; the parameters of the associated solution model are determined and the temperature-concentration dependence of the thermodynamic properties of Co–Ni–Ti and Co–Ti–Zr melts is established; a new thermodynamic assessment of the Co–Ti system was developed and its phase diagram was calculated; a set of consistent data on the thermodynamic properties of melts, intermetallic compounds and phase equilibria was prepared for the thermodynamic assessment of the Co–Hf system within the CALPHAD method. Range of application: fine metallurgical synthesis; development of new technologies for synthesis of amorphous and high entropy alloys; research and development in the field of materials science.
Product Description
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Agraval Pavlo G
Vodopyanova Anna O.
Korsun Vladyslav A
Pidchenko Alina S.
Tymoshenko Oksana A
Turchanin Mykhailo A.
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2021-09-02
