The effect of the existing state of Y on high temperature oxidation properties of magnesium alloys

Effect of Zn addition on the oxidation property of Mg-Y alloy at high temperatures

“…The oxidation rate constant of Mg-3Y-2.5Zn alloy decreased more than one time compared with other four alloys in Table 2, which might be related to the chemical composition. Previous research demonstrated that the formation of Y 2 O 3 contained oxide film was beneficial to the improvement on oxidation resistance of magnesium alloys [19,22]. Thus, it was speculated that appropriate Zn content might be beneficial to the formation of Y 2 O 3 film and further enhance the oxidation resistance.…”

“…Zhao et al [16] investigated the oxidation behavior of AZ31 by adding La element, and found that the excellent oxidation resistance could be achieved by the addition of~0.7 wt% La. Recent work found that the oxidation resistance of magnesium alloys could be improved significantly by the addition of Y [18,19]. The dissolved Y element in the matrix was beneficial to improve the oxidation resistance of magnesium alloys [19].…”

“…Recent work found that the oxidation resistance of magnesium alloys could be improved significantly by the addition of Y [18,19]. The dissolved Y element in the matrix was beneficial to improve the oxidation resistance of magnesium alloys [19]. The formed MgO/Y 2 O 3 composite oxide film at high temperatures was compact and could prevent the attack of oxygen [18].…”

“…Nevertheless, Mg-Y-Zn ternary phase was bound to form in Mg-Y alloys by the addition of Zn element. Our previous work showed that the formation of high temperature stable compound would deteriorate the oxidation resistance of magnesium alloys [19]. Thus, the effect of the formation of Mg-Y-Zn ternary phase on oxidation resistance of the Mg-Y-Zn alloys should also be investigated.…”

Oxidation of magnesium alloys at elevated temperatures in air: A review

“…These paths could favour the dissolution and transport of oxygen beyond the oxide scale [133]. Recently, Yu et al [134] alloyed pure Mg with both 1-3 wt.% Y and 1.5 wt.% Sn. The combination effect of Y and Sn resulted in a higher oxidation resistance than that of single addition of Y.…”