Classification of high-temperature oxidation behavior of Mg-1 at% X binary alloys and application of proposed taxonomy to nonflammable multicomponent Mg alloys

High-temperature oxidation behavior of Mg-X binary alloys is classified by the thermodynamic and systematic observations of their oxides. The proposed taxonomy comprises three main types of oxides (MgO, XmOn, and XmOn/MgO) and two subgroups (thermally grown and thermal barrier) of each oxide type. Adding Yb and Ca to Mg results in the formation of thermal-barrier-type XmOn films, increasing the ignition temperature. Adding Be to XmOn-type alloys is more beneficial than its addition to MgO-type alloys.