Mechanical properties and in vitro biodegradation behavior of GASAR porous Mg-Ag alloy

Abstract

In this thesis, porous pure Mg and Mg-3 wt%Ag alloys with oriented regular pore structures were prepared by the metal/gas eutectic unidirectional solidification method (GASAR process). The effects of the Ag content on the mechanical properties and early in vitro biodegradation behavior of porous Mg-Ag alloys were investigated. The results of compression experiments showed that Ag addition significantly enhanced the compressive strength and elastic modulus of the porous Mg-Ag alloy. Immersion experiments in SBF at 37℃ showed that although the Mg-3 wt%Ag alloy exhibited a faster corrosion reaction, the addition of Ag facilitated the precipitation of calcium and phosphorus salts, resulting in better osteoinductivity of the samples, which indicates its feasibility as a potential tissue engineering scaffold.