Boron diffusion in bcc-Fe studied by first-principles calculations
Li Xianglong1, Wu Ping1, †, , Yang Ruijie1, Yan Dan1, Chen Sen1, Zhang Shiping1, Chen Ning2
       

The four-frequency model of boron diffusion in bcc-Fe. Here, ω1 is the solvent-vacancy exchange frequency, ω2 is the solute–vacancy exchange frequency, ω3 is the dissociation frequency of the complex, and ω4 is the association frequency of the complex.