Indian Journal of Science and Technology

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Formation of Titanium Carbide Particles from Cu–Ti–C Metal MELT


Affiliations
1 Department of Materials Science and Physics and Chemistry of Materials, South Ural State University, 76 Lenin Avenue, Chelyabinsk, Russian Federation
2 Department of the Engineering and Technology of Production Materials, South Ural State University, Zlatoust Branch, Zlatoust, Russian Federation
 

Background: The relevance of this research is determined by the necessity of developing new hardened and high-conductivity alloys. Therefore, it aims at studying the possibility of producing disperse hardening carbide particles in a metal copper melt directly. Method: Fact Sage v.7.0 SW package (SGTE database) was used for the thermodynamic simulation of phase equilibria. Experimental work to review the results of interactions processes of a copper-titanium alloy and graphite was also conducted. Metal specimens of the Cu-Ti-C system were obtained during the experimental research. The shape and composition of produced non-metal inclusions were determined, while studying the experimental specimens using a scanning-electron microscope and electron microprobe analysis. Findings: A thermodynamic simulation of phase equilibria in the copper corner of the equilibrium diagram of a Cu-Ti-C system under the conditions of a copper-based liquid-alloy available in a temperature range of 1100 to 1500°С was done within the framework of this research. Simulation results are presented as a liquidus surface, specifying areas of existence of phases that are conjugated with the metal melt. According to our simulation, non-stoichiometric titanium carbide of variable composition will be a phase that is in equilibrium with the metal melt against significant titanium concentration in the copper liquid-alloy. It is found that non-metal inclusions in the experimental samples that were obtained under exposure of the metal melt in contact with graphite are represented by titanium carbide particles of the size 5 μm at most. Carbon to titanium ratio in the particles is C/Ti=0.76. No titanium carbides are produced, if the copper-titanium metal melt is poured into a graphite casting form. Improvements: Outputs may be used to analyze technological processes in copper and copper-based alloy production and to develop compositions of alloying compositions for metal matrix composite production.

Keywords

Cu-T-C System, Metal Matrix Composites, Phase Equilibria, Thermodynamic Simulation.
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  • Formation of Titanium Carbide Particles from Cu–Ti–C Metal MELT

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Authors

Olga Vladimirovna Samoilova
Department of Materials Science and Physics and Chemistry of Materials, South Ural State University, 76 Lenin Avenue, Chelyabinsk, Russian Federation
Evgeny Alekseevich Trofimov
Department of the Engineering and Technology of Production Materials, South Ural State University, Zlatoust Branch, Zlatoust, Russian Federation
Vladimir Ivanovich Geraskin
Department of Materials Science and Physics and Chemistry of Materials, South Ural State University, 76 Lenin Avenue, Chelyabinsk, Russian Federation

Abstract


Background: The relevance of this research is determined by the necessity of developing new hardened and high-conductivity alloys. Therefore, it aims at studying the possibility of producing disperse hardening carbide particles in a metal copper melt directly. Method: Fact Sage v.7.0 SW package (SGTE database) was used for the thermodynamic simulation of phase equilibria. Experimental work to review the results of interactions processes of a copper-titanium alloy and graphite was also conducted. Metal specimens of the Cu-Ti-C system were obtained during the experimental research. The shape and composition of produced non-metal inclusions were determined, while studying the experimental specimens using a scanning-electron microscope and electron microprobe analysis. Findings: A thermodynamic simulation of phase equilibria in the copper corner of the equilibrium diagram of a Cu-Ti-C system under the conditions of a copper-based liquid-alloy available in a temperature range of 1100 to 1500°С was done within the framework of this research. Simulation results are presented as a liquidus surface, specifying areas of existence of phases that are conjugated with the metal melt. According to our simulation, non-stoichiometric titanium carbide of variable composition will be a phase that is in equilibrium with the metal melt against significant titanium concentration in the copper liquid-alloy. It is found that non-metal inclusions in the experimental samples that were obtained under exposure of the metal melt in contact with graphite are represented by titanium carbide particles of the size 5 μm at most. Carbon to titanium ratio in the particles is C/Ti=0.76. No titanium carbides are produced, if the copper-titanium metal melt is poured into a graphite casting form. Improvements: Outputs may be used to analyze technological processes in copper and copper-based alloy production and to develop compositions of alloying compositions for metal matrix composite production.

Keywords


Cu-T-C System, Metal Matrix Composites, Phase Equilibria, Thermodynamic Simulation.



DOI: https://doi.org/10.17485/ijst%2F2016%2Fv9i36%2F127110