Isothermal Section of the B-Cr-Fe System at 873 K
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An experimental study of the phase equilibria of the B-Cr-Fe ternary system at 873 K by means of x-ray diffraction and scanning electron microscopy has been carried out. Iron and chromium solid solutions, six chromium borides Cr2B, Cr5B3, CrB, Cr3B4, CrB2 and CrB4, two iron borides Fe2B and FeB, intermetallic σ phase, and β-rhombohedral B were identified in the B-Cr-Fe model alloys after long-term annealing (2160-2300 h). Solubilities of chromium in iron borides and iron in chromium borides were determined. No ternary phase was found in the system. Based on the experimental results, an isothermal section of the B-Cr-Fe system at 873 K was established.
Keywordsboride isothermal section phase diagram ternary system
The authors are grateful to the Slovak Grant Agency VEGA (Project No. 2/0073/18) and the Slovak Research and Development Agency (Project No. APVV-15-0049) for financial support.
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