Flux-Induced Instability and Bifurcations of Kirkendall Planes

Flux-Induced Instability and Bifurcations of Kirkendall Planes 

From the intuitive viewpoint, it seems strange that the markers initially smear over the whole concentration range of the diffusion couple (located in quite a narrow region, though), and then gather into one plane which corresponds to only one fixed (constant) composition this plane is generally referred to as the Kirkendall plane. It is accepted [31-35] that the (K-planes is a plane of initial contact moving at parabolic dependence 

Logically, a few questions arise why should a system have only one attractor Is it possible for a binary system to have two or more attractors Can the diffusion proceed in the system without attractors (stable K-planes), with marker distributions broadening with time In the latter case, a system may forget the initial contact plane that results in an especially tight connection between the materials. Thus, the problem of instabihties and bifurcations of K-planes appears. As shown below, this problem has a sound experimental basis. 

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