The 600 degree C and 450 degree C isothermal sections of the Zn-Fe-B system

The isothermal sections of Zn-Fe-B ternary system at 600 degree C and 450 degree C have been determined experimentally using scanning electron microscopy, electron probe microanalysis and X-ray diffraction. Five three-phase regions exist in the isothermal section at 600 degree C, seven three-phase regions exist at 450 degree C. The experimental results indicate that B is almost insoluble in Fe-Zn compounds and ot-Fe. The solubility of Zn in Fe(2)B and FeB at 600 degree C is 1.8 at.% and 2.5 at.%, respectively, and that at 450 degree C is 1.7 at.% and 2.1 at.%, respectively. All Fe-Zn compounds can be in equilibrium with Fe(2)B, the equilibrium between FeB and C, prohibits the coexistence of Fe(2)B and liquid at 450 degree C. Both FeB and Fe(2)B are in equilibrium with the liquid phase at 600 degree C.