Experimental and thermodynamic assessment of the Ce–Zr system

• Published in: Calphad Vol. 46; pp. 213 - 219
• Main Authors: Mattern, N., Yokoyama, Y., Mizuno, A., Han, J.H., Fabrichnaya, O., Wendrock, H., Harada, T., Kohara, S., Eckert, J.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-09-2014
• Subjects: Assessments; CALPHAD; Ce–Zr; Computer simulation; Conical nozzle levitation; Diffraction; in situ X-ray diffraction; Liquidus; Mathematical models; Phase diagram; Phase diagrams; Phase transformations; Thermodynamic assessment; Thermodynamics; CALPHAD; in situ X-ray diffraction; Phase diagram; Conical nozzle levitation; Thermodynamic assessment; Ce–Zr
• ISSN: 0364-5916
• DOI: 10.1016/j.calphad.2014.05.002

The phase equilibria of the binary Ce–Zr system have been investigated between 900K and 1800K by a combining conical nozzle levitation technique with in situ high energy synchrotron X-ray diffraction. From the diffraction data the phase sequences and the liquidus line were determined experimentally. The Ce–Zr system is an eutectic type. The eutectic reaction L↔bcc-Ce+hcp-Zr occurs at T=1113±5K at the eutectic composition of 1.5±1 at% Zr. Based on the experimental data a self-consistent thermodynamic description of Ce–Zr phase diagram is derived.
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•The Ce–Zr phase diagram is experimentally assessed.•in situ XRD was combined with levitation to study liquid phase equilibria.•The monotectic Ce–Zr phase diagram reported in data base is wrong.•The Ce–Zr is a eutectic system, like Nd–Zr and Gd–Zr.•A consistent thermodynamic description of the Ce–Zr system is derived.