Pseudo-binary phase diagram along NdBa2Cu3Oy-Ba3Cu5Oz under pO(2) of 0.01 atm

We report the NdBa2Cu3Oy (Nd123)-Ba3Cu5Oz(035) pseudo-binary section in the Nd2O3-BaO-CuO system under the oxygen partial pressure pO(2) = 0.01 atm. W e performed thermogravitational and differential thermal analysis (TG-DTA) and powder x-ray diffraction (XRD) measurements for quenched samples. We al so performed high-temperature XRD for the determination of equilibrium soli d phases at elevated temperatures. In situ observation of the primary solid phases with laser scanning microscopy was also performed for an accurate d etermination of the liquidus line. In comparison with the Nd123-035 pseudo- binary phase diagram in air, the liquidus line under pO(2) = 0.01 atm shift s to a lower temperature.