Interdiffusion and Internal Stress Effects in Closed Geometry

Authors

  • Barbara Sárközi Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary. Doctoral School of Physics, University of Debrecen, Debrecen, Hungary
  • Gergő Vecsei Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary. Doctoral School of Physics, University of Debrecen, Debrecen, Hungary
  • Zoltán Erdélyi Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
  • Csaba Cserháti Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary

DOI:

https://doi.org/10.62721/diffusion-fundamentals.39.1276

Keywords:

Diffusion

Abstract

This study examines how cylindrical geometry influences interdiffusion and stress development during the formation of ZnAl₂O₄ in nanoscale Pt/Al₂O₃/ZnO structures. Double-layered nanopillars with different diameters were annealed to induce reactive diffusion, and STEM imaging was used to measure intermetallic growth. Smaller pillars exhibited thinner ZnAl₂O₄ layers due to stronger diffusion-inhibiting stresses that cannot relax in closed geometries. At longer times parabolic growth behavior was observed. These results show that curvature-dependent stress fields play a key role in regulating diffusion kinetics at the nanoscale.

References

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Published

2025-11-27

How to Cite

[1]
B. Sárközi, G. Vecsei, Z. Erdélyi, and C. Cserháti, “Interdiffusion and Internal Stress Effects in Closed Geometry”, diffus. fundam., vol. 39, Nov. 2025, doi: 10.62721/diffusion-fundamentals.39.1276.

Issue

Vol. 39 (2025): Special Issue Diffusion Fundamentals XI

Section

Articles

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Copyright (c) 2025 Barbara Sárközi, Gergő Vecsei, Zoltán Erdélyi, Csaba Cserháti

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This work is licensed under a Creative Commons Attribution 4.0 International License.