| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Thermodynamics and Phase Diagrams Applied to Materials Design and Processing: An FMD/SMD Symposium Honoring Rainer Schmid-Fetzer
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| Presentation Title |
A thermodynamic evaluation of the U-Zr-N system
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| Author(s) |
Yulia Mishchenko, Denise Adorno Lopes, Malin Selleby |
| On-Site Speaker (Planned) |
Yulia Mishchenko |
| Abstract Scope |
In this study thermodynamic properties of the ternary system U-Zr-N are described using the Calphad technique and newly obtained experimental results. As part of the experimental investigation the microspheres of the compositions UN-2at%ZrN, UN-10at%ZrN, UN-25at%ZrN were manufactured by sol-gel method. The sintered microspheres were annealed at 800 oC, 1000 oC and 1200 oC and quenched to room temperature. A number of tielines were determined using scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Considering very slow diffusion rates of Zr atoms in UN and the possibility of not reaching equilibrium in the samples during annealing, theoretical calculations were also performed. A set of ternary interaction parameters for the system U-Zr-N was determined by performing computerised optimization procedure using Parrot module of Thermo-Calc software. The calculated isothermal sections of the ternary phase diagram are presented and compared with the experimental data used in the assessment. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nuclear Materials, Characterization |