An investigation of phase behavior in the Co-Se-Sn ternary system using experiments and thermodynamic modeling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00133888" target="_blank" >RIV/00216224:14310/23:00133888 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

An investigation of phase behavior in the Co-Se-Sn ternary system using experiments and thermodynamic modeling

Popis výsledku v původním jazyce

The ternary Co-Se-Sn system has been investigated experimentally to determine the phase equilibria and the microstructure of the alloys formed at different temperatures (400, 700, 1000 °C). Samples of various compositions were prepared by melting, annealing, and quenching techniques and characterized using scanning electron microscopy, X-ray diffraction and thermal analysis. The combined experimental results confirmed the presence of several binary phases in this system, including Co3Sn2, CoSn2, CoSe, Co9Se8, CoSe2, SeSn and one ternary phase Co2(SnSe)3. Furthermore, a new thermodynamic description of this system was introduced using the CALPHAD (CALculation of PHAse Diagrams) approach to predict and describe the phase equilibria, including the development of new models for phases CoSe Co9Se8 and CoSe2. The models and thermodynamic description were verified by comparing the predicted phase diagrams with the experimental data obtained in this study. The experimental and modelling results obtained in this study provide new insights into the behaviour of the Co-Se-Sn system and can be applied in the design and optimization of Co-based alloys for various industrial applications, such as magnetic storage media, hightemperature materials, and thermoelectric devices.

Název v anglickém jazyce

An investigation of phase behavior in the Co-Se-Sn ternary system using experiments and thermodynamic modeling

Popis výsledku anglicky

The ternary Co-Se-Sn system has been investigated experimentally to determine the phase equilibria and the microstructure of the alloys formed at different temperatures (400, 700, 1000 °C). Samples of various compositions were prepared by melting, annealing, and quenching techniques and characterized using scanning electron microscopy, X-ray diffraction and thermal analysis. The combined experimental results confirmed the presence of several binary phases in this system, including Co3Sn2, CoSn2, CoSe, Co9Se8, CoSe2, SeSn and one ternary phase Co2(SnSe)3. Furthermore, a new thermodynamic description of this system was introduced using the CALPHAD (CALculation of PHAse Diagrams) approach to predict and describe the phase equilibria, including the development of new models for phases CoSe Co9Se8 and CoSe2. The models and thermodynamic description were verified by comparing the predicted phase diagrams with the experimental data obtained in this study. The experimental and modelling results obtained in this study provide new insights into the behaviour of the Co-Se-Sn system and can be applied in the design and optimization of Co-based alloys for various industrial applications, such as magnetic storage media, hightemperature materials, and thermoelectric devices.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10403 - Physical chemistry

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů