Comparison of Properties of Lead-Antimony Alloys Made by Spark Plasma Sintering of Powders Obtained by Electrodispersion of Waste of the SSu3 Alloy in Water and Kerosene

The purpose of this work is to compare the composition, structure and properties of lead-antimony alloys made by spark plasma sintering of powders obtained by electrodispersing waste of the CCu3 alloy in distilled water and lighting kerosene. 

Methods. Recycling of the initial SSu-3 alloy was carried out at an experimental facility for electrodispersion. The dispersion process was carried out in two working media - in kerosene and in water. As a result, a charge of a leadantimony alloy was obtained. Then the resulting charge was fused in the SPS 25-10 Thermal Technology system. The composition, structure and properties of the obtained alloys were studied using modern metallographic equipment.

Results. It has been established that the spark plasma fusion method makes it possible to obtain alloys from the resulting charge that have properties different from those used industrially. It is noted that the surface of these alloys is heterogeneous, has pores and cracks. X-ray spectral analysis of the alloy obtained in kerosene and distilled water showed that Pb, O and Sb are contained on the surface of both alloys. The analysis of the phase composition showed that the composition of the alloy obtained in kerosene lighting contains such phases as Pb₂OCO₃, Pb₂O₃, Sb₆O₁₃ and the phase of pure Pb, the composition of the alloy obtained in distilled water includes such phases as Sb₂O₄, Pb₃O₄ and the phase of pure Pb. Porosity analysis of the obtained alloys showed that the number of large pores is higher in the alloy obtained in water, but the pore area is lower than in the alloy obtained in kerosene. As a result of testing both alloys for microhardness, it can be concluded that the alloy obtained in distilled water has a higher microhardness.

Conclusion. The paper solves an important scientific and practical problem aimed at creating a progressive, environmentally friendly, low-tonnage and waste-free technology for producing new lead-antimony powders suitable for industrial use and alloys based on them.

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