Study on ignition proof magnesium alloy with beryllium and rare earth additions

Surface oxidation behavior of MgNd alloys

“…AES spectra of MgNd alloys (Nd = 25 wt.%) oxidized in pure O 2 up to 90 min at (a) 723 K, (b) 773 K and (c) 823 K. Magnesium (a) and neodymium (b) AES peaks across the oxide layer for the MgNd alloys (Nd = 25 wt.%) oxidized in pure O 2 up to 90 min at 773 K.concentration can be attributed to the overlap of the reducing of Mg 2+ and the increasing of the metallic magnesium across the oxide layer, which is in agreement with other reports[25]. For neodymium, the similar Auger lines shift was observed (94.0 eV !…”

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

“…Huang et al [165] reported an increase of 200 C in the ignition temperature of a Mg-2Ca alloy after alloying with 300 ppm (wt) Be. Zeng et al [166,167] reported that 0.3 wt.% Be-containing AZB910 could be melted without burning, even without a shielding gas. Fig.…”

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

“…For this reason, Mg-RE are considered as one of the most important candidates for powertrain applications [9]. The improved oxidation resistance of Mg-RE alloys is attributed to the improve plasticity of the formed oxide film [10] and to changes in the microstructure, such as grain refinement [11][12][13][14] and precipitation of RE-containing intermetallic compounds with high stability at elevated temperatures [14].…”

“…Studies on the high temperature behavior of Mg-Al alloys modified with RE elements are often focused on the effect of Ce or Y addition on the ignition point [10][11][12][13][14][15][16]. Given that this point is normally above 437°C and the b-Mg 17 Al 12 phase melts above this temperature [17], the beneficial effect of RE elements is often associated with the reduction of the volume fraction of b-Mg 17 Al 12 phase, caused by precipitation of Al 11 RE 3 particles with high melting point along the grain boundaries [18,19].…”