The System Al2O3-Cr2O3-Sio2 |
| |
Authors: | P L ROEDER F P GLASSER† E F OSBORN |
| |
Affiliation: | College of Earth and Mineral Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802 |
| |
Abstract: | Liquidus phase equilibrium data are presented for the system Al2O3-Cr2O3-SiO2. The liquidus diagram is dominated by a large, high-temperature, two-liquid region overlying the primary phase field of corundum solid solution. Other important features are a narrow field for mullite solid solution, a very small cristobalite field, and a ternary eutectic at 1580°C. The eutectic liquid (6Al2O3-ICr2O3-93SiO2) coexists with a mullite solid solution (61Al2O3-10Cr2O3-29SiO2), a corundum solid solution (19Al2O3-81Cr2O3), and cristobalite (SO2). Diagrams are presented to show courses of fractional crystallization, courses of equilibrium crystallization, and phase relations on isothermal planes at 1800°, 1700°, and 1575°C. Tie lines were sketched to indicate the composition of coexisting mullite and corundum solid solution phases. |
| |
Keywords: | |
|
|