Abstract
The liquidus projection at the boron-rich corner of the B-Fe-U phase diagram is proposed based on powder X-ray diffraction measurements, heating curves, and scanning electron microscopy observations, complemented with both energy dispersive X-ray spectroscopy and electron probe microanalysis. Evidence for six ternary reactions is presented, the corresponding 12 monovariant lines are drawn, and the nature and location of the ternary reactions are given. The ternary compounds existing in this region of the B-Fe-U ternary phase diagram, UFeB4 and UFe2B6, were confirmed to be formed by ternary peritectic reactions, yet UFeB4 has a considerably larger primary crystallization field, which points to an easier preparation of single crystals of this compound, when compared with UFe2B6.
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