STRUCTURAL, SURFACE AND TRANSPORT PROPERTIES OF Sn–Ag ALLOYS

F. Meydaneri Tezel, B. Saatçi, M. Ari, S. Durmuş Acer and E. Altuner
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F. Meydaneri Tezel: Department of Metallurgical and Materials Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey
B. Saatçi: #x2020;Department of Physics, Erciyes University, 38039 Kayseri, Turkey
M. Ari: #x2020;Department of Physics, Erciyes University, 38039 Kayseri, Turkey
S. Durmuş Acer: #x2021;Department of Energy Systems Engineering, Simav Faculty of Technology, Dumlupınar University, 43500 Kütahya, Turkey
E. Altuner: #x2020;Department of Physics, Erciyes University, 38039 Kayseri, Turkey

Surface Review and Letters (SRL), 2017, vol. 24, issue 03, 1-13

Abstract: The structural, surface and transport properties of Sn–Ag alloys were investigated by X-ray diffraction (XRD), radial heat flow, energy-dispersive X-ray (EDX) analysis, scanning electron microscopy (SEM) and four-point probe techniques. We observed that the samples had tetragonal crystal symmetry except for the pure Ag sample which had cubic crystal symmetry, and with the addition of Ag the cell parameters increased slightly. Smooth surfaces with a clear grain boundary for the samples were shown on the SEM micrographs. The grain sizes of pure Ag, β-Sn and the formed Ag3Sn intermetallic compound phase for Sn–x wt.% Ag [x=1.5, 3.5] binary alloys were determined to be 316nm, between 92nm and 80nm and between 36nm and 34nm, respectively. The values of electrical resistivity for pure Sn, pure Ag and Sn–x wt.% Ag [x=1.5, 3.5] were obtained to be 22.60×10−8, 62.36×10−8, 23.54×10−8, 24.62×10−8Ω⋅m at the temperature range of 300–450K, respectively. Thermal conductivity values of pure Sn and Sn–x wt.% Ag [x=1.5, 3.5] binary alloys were found to be 60.60±3.75, 69.00±4.27 and 84.60±5.24W/Km. These values slightly decreased with increasing temperature and increase with increasing of the Ag composition. Additionally, the temperature coefficients of thermal conductivity and electrical resistivity and the Lorenz numbers were calculated.

Keywords: Electrical resistivity; radial heat flow; surface properties; grain size (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500330

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