Effect of chemical composition on microstructure, hardness and electrical conductivity profiles of the Bi-Cu-Ga alloys at 100 °C

  • Dejan Gurešić University in Priština, Faculty of Technical Science, K.M. 7, 4000 Kos. Mitrovica, Serbia
  • Nadežda Talijan University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Belgrade, Serbia
  • Vladan Ćosović University of Belgrade, Institute of Chemistry, Technology and Metallurgy
  • Dušan Milisavljević University in Priština, Faculty of Technical Science, K.M. 7, 4000 Kos. Mitrovica, Serbia
  • Aleksandar Đorđević University in Priština, Faculty of Technical Science, K.M. 7, 4000 Kos. Mitrovica, Serbia
  • Milica Tomović University in Priština, Faculty of Technical Science, K.M. 7, 4000 Kos. Mitrovica, Serbia

Abstract

Theoretical calculation and experimental investigation of the isothermal section of a ternary Bi-Cu-Ga system at 100 oC are presented in this paper. Thermodynamic binary-based calculation of the isothermal section was performed using Pandat software. Experimental investigation included microstructural analysis carried out using light optical microscopy (LOM) and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), phase composition analysis using X-ray diffraction (XRD), Brinell and Vickers hardness testing and electrical conductivity measurements. In total, thirty alloy samples with compositions along three vertical sections Bi-CuGa, Cu-BiGa and Ga-BiCu were studied. The obtained experimental results support the calculated phase regions of the isothermal section at 100 oC. Hardness of individual phases as well as hardness and electrical conductivity of the studied alloys were measured. Based on the experimentally obtained results iso-lines of Brinell hardness and electrical conductivity along the whole compositional range were calculated by using appropriate mathematical models.

Author Biography

Vladan Ćosović, University of Belgrade, Institute of Chemistry, Technology and Metallurgy
Department of Materials and Metallurgy, 

Full research professor / Scientific advisor

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Published
2016-09-14
Section
Articles - archived