Thermodynamic description of Si-B binary system

• DOI: 10.1016/j.proeng.2012.01.1027
• Publication Date: 2012-02-19T05:07:37Z
• Authors: Jijun Wu; Wenhui Ma; Duzuo Tang; Binjie Jia; Bin Yang; Dachun Liu; Yongnian Dai
• Keywords: thermodynamic; 0103 physical sciences; Si-B binary system; metallurgical grade silicon; 02 engineering and technology; 0210 nano-technology; 01 natural sciences; CompuTherm; Engineering(all)

AbstractThe Si-B binary system was thermodynamically assessed and described using the CompuTherm Pandat software. The solution phases, including Liquid, diamond-Si and β-B were treated as substitutional solution phases, of which the Gibbs energies were expressed with Redlich-Kister polynomial functions. Meanwhile, the compounds, SiB3, SiB6, SiBn, were modeled as stoichiometric compounds. The thermodynamic parameters formulating the Gibbs energies of various phases were obtained and the equilibrium and transition of phases were discussed. The existent forms for Si-B phases in MG-Si melt were forecast.