FULLY DEGRADABLE MAGNESIUM ALLOY AND PREPARATION METHOD THEREOF

摘要

Provided is a novel cardio-/cerebrovascular stent material of fully degradable magnesium alloy. The fully degradable magnesium alloy comprises magnesium and alloying elements, wherein the weight ratio of magnesium is not less than 85%, and the alloying elements include any one or a combination of several of gadolinium, erbium, thulium, yttrium, neodymium, holmium and zinc. The fully degradable magnesium alloy of the present invention has mechanical properties meeting the requirements of a cardio-/cerebrovascular biological stent, excellent corrosion resistance in vitro as demonstrated in in-vitro immersion corrosion test and electrochemical corrosion test, excellent biocompatibility as indicated in in-vitro cytotoxicity test, and a controllable degradation rate with good biocompatibility.