Investigation of interdiffusion and kirkendall effect in the Co-Ni-Fe system: III. Dependence of diffusion parameters on the initial conditions
Investigation of interdiffusion and kirkendall effect in the Co-Ni-Fe system: III. Dependence of diffusion parameters on the initial conditions
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Co-Ni-Fe体系中相互扩散和柯肯德尔效应的研究：III．
DOI：
10.1134/s0031918x10110086
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
J. Priimets
中科院分区：
文献类型：
--
作者：
Y. Ugaste;A. Kodentsov;J. Priimets
本文以Co-Fe-Ni体系为具体例子，研究了相互扩散参数（有效系数、扩散路径、Kirkendall位移）与扩散对初始组分变化的关系。实验结果表明，三组分体系的扩散路径在很大程度上取决于初始条件的选择，即使“较窄”扩散对的初始合金位于“较宽”扩散对的扩散路径上。同时，在降低浓度时，所有这些扩散偶的扩散路径实际上是一致的。后者使得对任何初始共聚位置在同一浓度区内的扩散偶的扩散路径类型进行预测成为可能。在研究的一个扩散偶中，揭示了迄今为止只在双星系统中观察到的Kirkendall平面的不稳定性。
Dependences of the parameters of interdiffusion (effective coefficients, diffusion paths, Kirkendall shift) on the variation of the initial compositions of a diffusion couple have been studied on the concrete example of the Co-Fe-Ni system. The experimental results obtained show that the diffusion paths in the three-component system depend substantially on the selection of initial conditions, even when the initial alloys of the “narrower” diffusion couple lie on the diffusion path of the “wider” pair. At the same time, when represented in reduced concentrations, the diffusion paths of all these diffusion couples practically coincide. The latter makes it possible to predict the type of diffusion paths for any diffusion couple whose initial com- position lies in the same concentration region. In one of the diffusion couples studied, the instability of the Kirkendall plane was revealed, which thus far was observed only in binary systems.