论文标题
一系列（cocrfemn）$ _ {100-x} $ ni $ _x $合金中的示踪剂扩散的实验和理论研究
Experimental and theoretical study of tracer diffusion in a series of (CoCrFeMn)$_{100-x}$Ni$_x$ alloys
论文作者
论文摘要
在一系列（cocrfemn）$ _ {100-x} $ ni $ _x $合金中，在各种温度下研究了所有构成元素的示踪剂扩散，这些元素的成分从纯Ni到epoiatomic cocrfemnni高输入合金。在给定的同源温度下，测得的示踪剂扩散系数沿着从纯ni到浓缩合金的过渡，最后是均衡型cocrfemnni合金的过渡。这是通过基于修改的嵌入式原子电位的原子蒙特卡洛模拟来解释的，该模拟揭示了空位周围原子构型的局部异质性会导致相关效应，并引起与随机合金模型的预测的显着偏差。
Tracer diffusion of all constituting elements is studied at various temperatures in a series of (CoCrFeMn)$_{100-x}$Ni$_x$ alloys with compositions ranging from pure Ni to the equiatomic CoCrFeMnNi high-entropy alloy. At a given homologous temperature, the measured tracer diffusion coefficients change non-monotonically along the transition from pure Ni to the concentrated alloys and finally to the equiatomic CoCrFeMnNi alloy. This is explained by atomistic Monte-Carlo simulations based on a modified embedded-atom potentials, which reveal that local heterogeneities of the atomic configurations around a vacancy cause correlation effects and induce significant deviations from predictions of the random alloy model.
