(Solved): 1. Consider the following simple binary phase diagram below which shows the phase relationships occ ...

1. Consider the following simple binary phase diagram below which shows the phase relationships occurring in the system ${\mathrm{Al}}_2{\mathrm{O}}_3?{\mathrm{Cr}}_2{\mathrm{O}}_3$ at 1 atm pressure. Answer the following questions (page 12) a. What is the melting point of ${\mathrm{Al}}_2{\mathrm{O}}_3$ ? b. What phases exist below the melting point of ${\mathrm{Al}}_2{\mathrm{O}}_3$ ? Explain c. What is the melting temperature of ${\mathrm{Cr}}_2{\mathrm{O}}_3$ ? d. What phases exist above this temperature. Explain. e. Discuss what happens at temperature T1.