Abstract
The assimilation of Mn-Al compacts into liquid Mg starts with the incubation period, where the Mg bath acts as a heat source. Following this period, the exothermic reactions are triggered and the compacts are heated eventually to temperatures which are higher than the liquid Mg temperature. In tandem with the exothermic events in the Mn-Al compacts, swelling takes place, followed by compact disintegration. The compact's maximum centreline temperature rise is affected by the Mn content of the compact, by the powder apparent contact area, and by the size of the compact. Recovery was affected by the compact's Mn content and the Mg bath temperature of the compact. For small sized compacts, the highest recoverywas observed in a compactwith Mn content of 50 wt% immersed in an Mg bath at 750°C. The large sized compacts exhibited a much lower recovery.
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