Abstract
This work developed thermodynamic models for describing phase stability and thermodynamic property of the Fe-Cr-Zr system using the Calphad approach coupled with experimental study. Thermodynamic descriptions of the Fe-Cr and Cr-Zr systems were either directly adopted or slightly modified from literature. The Fe-Zr system has been remodeled to accommodate recent ab-initio calculation of formation enthalpies of various Fe-Zr compounds. Reliable ternary experimental data and thermodynamic models were mainly available in the Zr-rich region. Therefore, selected ternary alloys located in the vicinity of the eutectic valley of β(Fe,Cr,Zr) and (Fe,Cr)2Zr laves phase in the Fe-rich region have been experimentally investigated in this study. Microstructure has been examined by using scanning electron microscope, energy-dispersive X-ray spectroscopy and X-ray diffraction. These experimental results, along with the literature data were then used to develop thermodynamic models for phases in the Fe-Cr-Zr system. Calculated phase equilibria and thermodynamic properties of the ternary system yield satisfactory agreements with available experimental data.
| Original language | English |
|---|---|
| Pages (from-to) | 190-202 |
| Number of pages | 13 |
| Journal | Journal of Nuclear Materials |
| Volume | 441 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 2013 |
Funding
This research was supported by the US Department of Energy (DOE), Office of Nuclear Energy, Nuclear Engineering Enabling Technology (NEET) Advanced Reactor Material Program, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. SEM and EDS was conducted in ORNL’s Shared Research Equipment (ShaRE) User Facility, which is sponsored by the Office of Basic Energy Sciences, US DOE.