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4. Ternary phase diagram The followings are the phase diagram of the Si-Mg-Al system. The melting ...
4. Ternary phase diagram The followings are the phase diagram of the Si-Mg-Al system. The melting temperatures of \( \mathrm{Si}, \mathrm{Mg} \) and \( \mathrm{Al} \) are 1420,650 , and \( 660^{\circ} \mathrm{C} \), respectively. (a) Draw the binary phase diagrams of \( \mathrm{Mg}-\mathrm{Si} \) and \( \mathrm{Al}-\mathrm{Si} \) systems as details as possible (indicate estimated invariant temperatures and compositions). Assume that there is no solid solution in the binary systems and all solids are stoichiometric compounds.