在Tiwari和Patil计算空位形成能的模型基础上,对金属表面能的计算方法进行了改进,计算了面心立方(fcc)、体心立方(bcc)、密排六方(hcp)典型金属的空位形成能,并引入能量修正因子,可使理论计算结果与实验值基本一致,对fcc,bcc,hcp结构金属的能量修正因子分别取1.292,1.265和1.357,可以比较精确地计算fcc,bcc,hcp金属的空位形成能。
Based on the model proposed by Tiwari and Patil, we improved the calculation method for surface energy, and calculated the vacancy formation energy for typical metals such as fcc, bcc and hcp metals. The calculated results and experimental values agree with each other when an energy modification coefficient is introduced. The energy modification coefficients of fcc, bcc and hcp metals are 1. 292, 1. 265 and 1. 357, respectively. The proposed method can calculate and predict the vacancy formation energy of metals efficiently.