STUDY OF MICROSTRUCTURE OF MAGNESIUM-ZIRCONIUM MASTER ALLOY AND HEAT-RESISTANT MAGNESIUM ALLOY ML10
This article presents the research of microstructure of magnesium-zirconium and ML10 alloys. It is hard to alloy magnesium with elements for which the fusing temperature is higher than that of magnesium's. The impurity doping of magnesium alloy with zirconium is processed through the magnesium-zirconium alloy, for which the fusing temperature is lower than the fusing temperature for zirconium. The impurity doping of light materials with zirconium is problematic not only because of the high fusing temperature of zirconium, but also because of its active liaison with other elements such as hydrogen, oxygen, nitrogen, aluminum, ferrum, silicon, carbon and other elements. The quality of alloy has been examined and the reasons of lower drawing of zirconium in the process of making ML10 magnesium alloy had been defined: it is linked with the fact that there are non-soluble intermetallides in the alloy such as zirconium and hafnium with silicon, ferrum and aluminum, and zirconium with oxygen and hydrogen. The reasons of pollution the ML10 magnesium alloys with zirconium compounds and residual elements had been studied and the advisability of readjustment of heat treatment routines for stabilization of the ML10 alloy structure had been analyzed as well.