| Abstract Scope |
Thermodynamic properties of the Si-B binary system were calculated using thermo-Calc software at a pressure of 1 bar. Gibbs free energy, enthalpy, entropy, and activity were calculated and plotted against temperature and composition. Gibbs free energy curves for all phases were discussed and found to be consistent with phase diagram. It is found that Gibbs free energy becomes more negative with temperature, and it shows minima at certain composition values for different phases. Enthalpy curves for all phases are plotted with composition, and they are consistent with Gibbs free energy curves, then plotted against temperature and showed increase from negative values to positive values. Entropy and activity curves for all phases were plotted against composition and temperature and thoroughly discussed. The largest value of boron activity is about 0.49, and the curves shown maxima then a monotonic decrease with temperature, where activity of boron becomes about 0.03. |