论文部分内容阅读
测定15种常见合金元素在Ll_2型金属间化合物Ni_3Si中900℃时的固溶度,并由相区扩展方向推估其取代方式。研究表明,它们在Ni_3Si中的固溶行为由尺寸因素和电子因素决定。即,取代行为由电子结构决定,固溶度由原子半径和电子结构共同决定。找到了一个能定量反映电子结构对取代方式影响的参数-相互作用参数,利用该参数定量地判断元素取代方式,并与原子半径一起成功地从半定量上说明固溶度大小。
The solid solubility of 15 kinds of common alloying elements at 900 ℃ in Ll_2type intermetallic compound Ni_3Si was measured and the substitution pattern was estimated from the direction of phase expansion. The results show that their solid solution behavior in Ni_3Si is determined by size and electronic factors. That is, the substitution behavior is determined by the electronic structure, which is determined by both the atomic radius and the electronic structure. Found a parameter - interaction parameter that can quantitatively reflect the influence of electronic structure on the substitution pattern, and used this parameter to quantitatively determine the element substitution pattern, and succeeded in semiquantitatively describing the degree of solid solubility together with the atomic radius.