研究了直接相关函数峰宽及k=0处峰对双模晶体相场模型相图的影响.结果表明,随着峰宽的增加,有序相的相区范围不断增大.而增大峰宽比可使体心立方(bcc)相区范围缩小,面心立方(fcc)相区范围大幅增加.直接相关函数k=0峰的引入则使相图被压缩,两相共存区变窄,液相稳定区域增加. The effects of the peak width of the direct correlation function and the peak at k = 0 on the phase diagram of the dual-mode crystal phase field model are investigated. The results show that the phase range of the ordered phase increases with the increase of the peak width, (Bcc) phase range can be reduced, the face-centered cubic (fcc) phase region range greatly increased.The introduction of the direct correlation function k = 0 leads the phase diagram to be compressed and the two-phase coexistence region becomes narrower, and the liquid Phase stability area increased.