Phase diagram of the Al2O3–ZrO2–Er2O3 system

The phase diagram of the Al2O3–ZrO2–Er2O3 system was constructed in the temperature range 1200–2800 °C. The phase transformations in the system are completed in eutectic reactions. No ternary compounds or regions of substantial solid solution were found in the components or binaries in this system. Four ternary and three binary eutectics were found first. The minimum melting temperature is 1720 °C and it corresponds to the ternary eutectic Al2O3 + F-ZrO2 + Er3Al5O12. The solidus surface projection, the schematic of the alloy crystallization path and the vertical sections present the complete phase diagram of the Al2O3–ZrO2–Er2O3 system.