The High-Solution Design of Magnesium Alloys

The oxidation behavior of Mg-Er binary alloys at 500 ℃

“…(4) The continuous oxidation of Er on the surface of Mg-Er alloys relies on the diffusion of Er from the matrix to the oxide/metal interface, which causes a depletion of Er layer under the oxide film. (5) The surface film of Mg-8.1Er (wt%) alloy was composed of four sublayers. Beneath an instantly formed high-reactivity trace-impurity oxide layer and a thin MgO and Er 2 O 3 mixture layer, the double Er 2 O 3 layers consisting of a compact fine-grain layer and an underlying coarse-columnar-grain layer providing the protective effect.…”

“…Magnesium (Mg) alloys are regarded as the next generation structural metal materials following iron alloys and aluminum alloys [1][2][3]. They have gained increasing interest for industrial applications, especially for aerospace, transportation, medical and 3C fields due to their low density, high specific strength and stiffness, good electromagnetic shield ability and biodegradability [4][5][6][7][8][9][10][11]. However, it is generally perceived that Mg and its alloys are easily oxidized at high temperature due to the high chemical activity of Mg and the absence of a formation of passive films.…”