Coupled Morphological Stability of the Multiple Phase Boundaries: Oxides in an Oxygen Potential Gradient. II. Two Oxide Layers

METALLOFIZIKA I NOVEISHIE TEKHNOLOGII, vol. 42, pp. 317–339

Abstract

The morphological stability of the interphase boundaries is a challenging problem, both from mathematical and physical point.In materials that are exposed to thermodynamic potential gradients, i.e., gradients of chemical potentials, electrical potential, temperature, or pressure, transport processes of the mobile components occur.In addition, changes in the morphology of the material surfaces and interfaces may appear.In this paper, a comprehensive formal treatment of the coupled morphological stability of multiple phase boundaries will be given for oxides that are exposed to an oxygen potential gradient.In the Part I of this paper the stability of the diffusionally interacting boundaries of a single oxide layer was explored using the original new method.The exact results obtained by this method where compared to the results obtained by the quasi-stationary approximation, which appeared to be quite precise.In the present communication we study the system of two adjacent oxide layers, i.e. the morphological stability of the three diffusionally interacting boundaries.

Authors 2

1. Petro O. Mchedlov-Petrosyan

   Kharkiv Institute of Physics and Technology

   Affiliation as printed

   A. I. Akhiezer Institute for Theoretical Physics , 1 Akademichna Str. , UA-61108 Kharkiv , Ukraine

   National Science Center 'Kharkiv Institute of Physics and Technology' , N .A.S. of Ukraine ,

   National Science Center 'Kharkiv Institute of Physics and Technology', N.A.S. of Ukraine, A. I. Akhiezer Institute for Theoretical Physics, 1 Akademichna Str., UA-61108 Kharkiv, Ukraine

2. Manfred Martin Aachen Institute of Physical Chemistry

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , Institute of Physical Chemistry , 2 Landoltweg , D-52056 Aachen , Germany

   RWTH Aachen University, Institute of Physical Chemistry, 2 Landoltweg, D-52056 Aachen, Germany