The research of the microstructure and properties ofMg-8Sn alloy prepared by SPS

Abstract:

Based on the better strength, corrosion resistance and plastic processing of Mg-8Sn alloy, Mg-8Sn alloy was prepared successfully in 530～590 ℃ by spark plasma sintering (SPS) in this paper. The microstructures, phases, mechanical properties and corrosion resistance were investigated. The research results showed that the microstructure consisted of α-Mg and Mg₂Sn phases, while Mg₂Sn was generated at the interface of Mg and Sn. The highest bending strengh of Mg-8Sn-1Zn-1Al was 215 MPa which was obtained at 570 ℃. The best corrosion resistance of Mg-8Sn-1Zn-1Al was obtained at 590 ℃, of which the corrosion potential and the corrosion current were respectively -1.5218 V, 1.9632×10_-5 A/cm₂. That was because Mg₂Sn was existed at particles bonding interface, which had protective effects on α-Mg.