Effect of Alloyed Mo on Mechanical Properties, Biocorrosion and Cytocompatibility of As-Cast Mg–Zn–Y–Mn Alloys

Abstract

The influences of Mo contents on mechanical properties, biocorrosion and cytocompatibility of as-cast Mg–6Zn–8.16Y–2.02Mn–xMo (x = 0.0, 0.1, 0.3, 0.5, 0.7 wt%) alloys were firstly investigated. Appropriate amount of Mo was conducive to grain refinement and the formation of long-period stacking ordered structure with continuous distribution, which was advantageous to mechanical properties and corrosion resistance. Mg–6Zn–8.16Y–2.02Mn–0.3Mo exhibited the ultimate tensile strength of 265.0 MPa, elongation of 13.5% and the lowest weight loss rate in Hank’s solution. Moreover, the cell toxicity cultured in 25% extract was evaluated and the alloy with 0.3 wt% Mo exhibited the best cytocompatibility. Thus, the alloy was expected to become a novel biodegradable implant material.