根据Miedema电荷迁移理论,引入固溶体中原子尺寸和间距随溶质浓度改变的观念,修正了Moreen的固溶体品格常数预测模型.用本修正方法可以更准确地预测平衡固溶体和溶体淬火制备的扩展固溶体的品格常数,计算了Cu-Al,Cu-Si,Ni-Al平衡固溶体和Ag-Sn,Ag-La,Ag-Gd系扩展固溶体的晶格常数,本修正方法计算值比Moreen模型计算值与试验值相符更好.
Based on the Miedema′s theory of electric charge shift,a modification of Mo-reen′s model of prediction of the lattice parameters in solid solution was approachedfrom the idea of the atomic size and separation in solid solution changing withsolute concentration.The lattice parameters in both solid solution at equilibrium andextended solid solution prepared by melt quenching seem to be predicted with moreaccuracy.By this modified model,the lattice parameters of Cu-Al,Cu-Si and Ni-Al systems solid solution at equilibrium and Ag-Sn,Ag-La and Ag-Gd extendedsolid solution were calculated.They are in better agreement with the experimentalvalues than the Moreen′s.
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