Question: Figure P 1 3 : Phase diagram for the binary ceramic silica - alumina ( S i O 2 - A l 2 O 3

Figure P13 : Phase diagram for the binary ceramic silica-alumina (SiO2-Al2O3) system
A composition of 50 wt SiO2-50 wt%Al2O3 is prepared.
a. At 1700C, what phases are present?
b. At 1700C, what are the chemical compositions of the phases?
c. At 1700C, what are the weight fractions of the phases? Use the
Lever Rule.
d. At 1500C, what phases are present?
e. At 1500C, what are the chemical compositions of the phases?
f. At 1500C, what are the weight fractions of the phases? Use the
Lever Rule
g. What happened when you cooled the composition from 1700C to 1500C?
Why?
Figure P13 : Phase diagram for the binary ceramic silica-alumina (SiO2-Al2O3)

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