Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7965494 | Journal of Nuclear Materials | 2015 | 7 Pages |
Abstract
Phase equilibria in the Zr-Nb-Cr system at 1573Â K and 1373Â K were characterized by X-ray diffraction (XRD) and electron probe microanalysis (EPMA) coupled with wavelength-dispersive spectroscopy (WDS). Three single-phase regions and two two-phase regions were identified in the isothermal sections of 1573Â K and 1373Â K. The single-phase regions are BCC (Cr), C15 and BCC (Zr, Nb), and the two-phase regions are BCC (Cr)Â +Â C15 and BCC (Zr, Nb)Â +Â C15. With the temperature decreasing from 1573Â K to 1373Â K, the BCC (Zr, Nb) phase region narrows slightly, while the C15 phase region shrinks noticeably in the Nb-rich direction. The problems concerning sample equilibration and weight loss in the experiments were discussed, and the C15 single-phase region was explored based on the site occupancy modelled by the compound energy formalism (CEF) coupled with first-principles calculations.
Related Topics
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Nuclear Energy and Engineering
Authors
Wen-Bo Wang, Hai-Jin Lu, Jian-Yun Shen, Xiao-Gang Lu, Yan-Lin He,