1995 年 81 巻 11 号 p. 1049-1054
Solubility of boron in molten Fe-B-N alloy equilibrated with solid BN at 1723K under various partial pressure of nitrogen, and the solubility of carbon in molten Fe-C-B alloy in the temperature range from 1573K to 1723K were measured to determine the thermodynamic parameters of boron in liquid iron.
By using the interstitial model, the activity coefficient of boron at infinite dilution (ΨB0) and the interaction parameters (θij) in liquid iron were determined as follows:
lnΨB0=-5.15, θNB=3.97, θBB=-0.12(1723K)
θCB=18900/T-6.34(1573K1723K)