Mechanical and electrical properties of ternary Ag-Bi-Ga system at 250 °C

  • Duško Minić University of Priština, Faculty of Technical Science, Kneza Milosa 7, Kos. Mitrovica
  • Dragan Manasijević University of Belgrade, Technical Faculty in Bor, VJ 12, 19210 Bor
  • Yong Du State Key Laboratory of Powder Metallurgy, Central South University, Changsha
  • Pavel Brož Masaryk University, Faculty of Science, Department of Chemistry, Brno
  • Vladan Ćosović University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Belgrade
  • Aleksandar Djordjević University of Priština, Faculty of Technical Science, Kneza Milosa 7, Kos. Mitrovica
  • Milena Premovic University of Priština, Faculty of Technical Science, Kneza Milosa 7, Kos. Mitrovica, Serbia; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China.
Keywords: Materials testing, isothermal section at 250 ºC, microstructure, hardness, electrical conductivity.

Abstract

This paper presents a comparative review of the experimental and thermodynamic assessment of a ternary Ag-Bi-Ga system. An isothermal section at 250 °C was calculated using optimized thermodynamic data for the constitutive binaries. Microstructures and phase compositions of studied alloys were analyzed by scanning electron microscopy in combination with energy dispersive spectrometry and X-ray powder diffraction technique. The obtained experimental results were found to support the predicted phase equilibria rather well. The hardness of alloys from three vertical sections (Bi-AgGa, Ag-BiGa, and Ga-AgBi) was determined using Brinell hardness test while the hardness of the individual identified phases was determined using Vickers microhardness test. Additional electrical conductivity measurements were carried out on the same alloy samples. Based on the experimentally obtained results iso-lines of Brinell hardness and electrical conductivity for the entire compositional range were calculated.

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Published
2017-09-30