Özet:

In this paper we study effect of carbon on structural and physical properties of FeB iron monoboride in Fe-B system alloys with carbon content of 0,05-0,90% (wt.) and boron content of 9,0-15,0% (wt.), the rest is iron. To determine the physical properties of alloys we use microstructure analysis, X-ray microanalysis and X-ray structural analysis. Carbon doping of FeВ iron monoboride leads to a feeble lattice strain and effects on the physical characteristics of boride. Using the quasi-chemical method we estimate the temperature dependence of the boride free energy and carbon solubility limit in FeB monoboride. Carbon can substitute up to 4% of boron atoms in FeB phase depending on the temperature. At high temperatures the carbon solubility in this phase increases. The obtained estimated data is in good agreement with experiment.

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