摘要
运用固体经验电子理论(EET),采用平均晶胞模型对Al-Zn-Mg合金固溶体价电子结构进行计算。结果表明,Al-Mg晶胞偏聚单元不能形成是由于Al-Mg键与α-Al基体的共价电子数相差很小,这两种晶胞偏聚能力相当,而Al-Zn-Mg晶胞中最强键Mg-Zn键最强,所以Zn和Mg同时加入对提高合金的强度效果更明显。
On the basis of average-cell model, the valence electron structure of Al-Zn-Mg solution is calculated according to the empirical electron theory. The results show that the Al-Mg segregated cell cannot exist because there is little difference in the number of the covalent bond between Al-Mg bond and α-Al matrix which means the equivalence between the segregated properties of these two cells. The strongest bond is Mg-Zn bond in Al- Zn-Mg cell, so addition of Zn and Mg simultaneously is much more effective in improving the strength of the alloy.
出处
《有色金属》
CAS
CSCD
北大核心
2007年第2期18-21,共4页
Nonferrous Metals
基金
青岛理工大学优秀青年教师科研启动基金项目(C2004-037)
