Abstract
The phase equilibria of the binary Gd–Ti system were studied by combining electrostatic levitation of the melt with high energy synchrotron in situ X-ray diffraction at elevated temperatures. The coexistence of the phases including the liquid was directly proven in the temperature range between T=1000 and 1920K. The Gd–Ti system is of monotectic type characterized by a miscibility gap in the liquid state above the monotectic temperature T=1841±5K. Together with experimental data from thermo-analysis and microstructure investigation of as-cast samples an improved Gd–Ti phase diagram is presented and a thermodynamic description is derived.
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