论文标题
身体对角线扩散夫妇方法用于估计多主体元件合金中示踪剂扩散系数
Body Diagonal Diffusion Couple Method for Estimation of Tracer Diffusion Coefficients in a Multi-Principal Element Alloy
论文作者
论文摘要
根据人体对角线扩散夫妇方法，对N分量系统中（N-1）2互扩散系数的估计需要（N-1）扩散路径。这些扩散系数与n（n-1）内在（或n个示踪剂扩散系数）有关，尽管在多组分系统的柯尔肯德尔标记实验之后，这些系数仍无法轻松估计，尽管它们对于理解原子学的扩散机制和材料的物理特性的原子机制，但它们的重要性。在这项研究中，显示了多组分系统中的身体对角扩散夫妇方法的概念，仅从两个扩散曲线中估算了示踪剂扩散系数。随后，人们可以估计固有和互插系数。这在很大程度上减少了整体努力，因为它仅需要两个而不是（n-1）扩散曲线，而不论组件的数量如何，并且可以促进所有类型的扩散系数的估计。将可用的示踪剂扩散系数与按照此方法估计的数据进行了比较。该方法也可以扩展到不可行的辐射方法的系统。
The estimation of (n-1)2 interdiffusion coefficients in an n component system requires (n-1) diffusion paths to intersect or pass closely in the (n-1) dimensional space according to the body diagonal diffusion couple method. These interdiffusion coefficients are related to n(n-1) intrinsic (or n tracer diffusion coefficients), which cannot be estimated easily following the Kirkendall marker experiment in a multicomponent system despite their importance for understanding the atomic mechanism of diffusion and the physico-mechanical properties of materials. In this study, the estimation of tracer diffusion coefficients from only two diffusion profiles following the concept of the body diagonal diffusion couple method in a multicomponent system is demonstrated. Subsequently, one can estimate the intrinsic and interdiffusion coefficients. This reduces the overall effort up to a great extent since it needs only two instead of (n-1) diffusion profiles irrespective of the number of components, with an additional benefit of enabling the estimation of all types of diffusion coefficients. The available tracer diffusion coefficients estimated following the radiotracer method are compared to the data estimated in this study following this method. This method can also be extended to the systems in which the radiotracer method is not feasible.
