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Microstructural evolution and physical properties of lead-tin alloys synthesized by melt-spinning technique

Author(s): Abu Bakr El-Bediwi, A.R.Lashin, Mustafa Kamal

Lead-tin alloy is frequently used to joint electronic components in electronic packaging and it is a based whitemetalwhich has excellent properties for the majority of internal combustion engines, such as crankshaft bearing linings in slow-speedmarine diesel engines.By usingX-ray diffraction (XRD), transmission electron microscopy (TEM), double bridge method and dynamic resonance technique, microstructure, electrical resistivity, temperature coefficient of resistivity (T.C.R), lattice parameter, crystal size and elastic modulus of Pb-Sn rapidly solidified alloys were investigated. Electrical resistivity, T.C.R, lattice parameter and crystal size of lead- tin alloy is decreased by increasing tin amounts in it but elastic modulus is increased. Tin- 3%lead rapidly solidified alloy have better electrical andmechanical properties with adequate melting point as solder alloy for electronic industrial applications. But lead- 5% tin is the better based alloy for bearing applications.

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