摘要
综合考虑了溶质元素与基体元素的原子半径、电负性以及外层电子数的立方根对溶质元素固溶度的影响，推导出二元合金的固溶度定量方程，提出了多元高温合金固溶极限曲线的预测新方法，并将其应用于计算镍基和钴基三元合金相图的γ／（γ＋σ）相界和γ（γ＋μ）相界。结果表明，计算的固溶极限曲线与已知相图的固溶极限曲线较吻合，与Ｍｄ值法计算的相界比较，该方法具有较高的精度。
Considering the effect of atomic radius,electronegativity and out shell electronic number of solute and solvent elements on the solubility of solute, solubility ( C ) equation of binary alloys was derived: C = A 1(ΔR)+A 2(ΔN) 2+A 3(ΔE 1/3 )+A 4.Constant A 1,A 2,A 3 and A 4 was acquired from binary nickel base alloys.A new prediction method of solubility based on this equation was proposed for calculating γ/(γ+σ) and γ/(γ+μ) boundary curves of nickel cobalt base ternary alloys phase diagrams.The calculated boundary curves are in well correspondent with experimental curves.Compared with boundary curves predicted by Md method,its accuracy was higher than that of Md method.
出处
《航空材料学报》
EI
CAS
CSCD
1998年第3期8-15,共8页
Journal of Aeronautical Materials
关键词
高温合金
固溶极限
原子半径
电负性
镍基
superalloys, solubility, atomic radius, electronegativity, out shell electronic number
