Abstract
The use of magnesium alloys in aerospace is relatively restricted by their poor ignition resistance performance. A continuous heating test was conducted to investigate the ignition resistance of pure Mg, ZM5, and ZM6 magnesium alloys with different alloying elements. It was found that alloying elements greatly influenced the ignition resistance of magnesium alloys. With about 2% addition of Nd rare earth element, ZM6 had a higher ignition temperature than pure Mg. In comparison, the ignition temperature of ZM5, which contains mainly about 8% Al alloying element, was lower than that of pure Mg. Analysis of high-temperature surface oxide film reveals that the higher ignition temperature of ZM6 resulted from a protective Nd2O3 oxide film formed on the oxidized surface. Alloying with rare earths can improve the ignition resistance of magnesium alloys.
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