Refining interface stress measurement in nanomultilayers through layer corrugation and interface roughness corrections
- 1. Laboratory for Advanced Materials Processing, Empa - Swiss Federal Laboratories for Materials Science and Technology, Thun, Switzerland
- 2. Laboratory for Mechanics of Materials & Nanostructures, Empa - Swiss Federal Laboratories for Materials Science and Technology, Thun, Switzerland
- 3. Laboratory for Joining Technologies and Corrosion, Empa - Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland
- 4. National Centre for Computational Design and Discovery of Novel Materials MARVEL, Empa, Thun, Switzerland
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Description
This study introduces new models that incorporate layer corrugation and interface roughness into standard approaches for measuring interface stress in nanomultilayers (NMLs). Applied to Cu/W NMLs, these models show that ignoring such features can inflate measured interface stress by up to 0.4 J/m^2. However, corrugation and roughness alone cannot account for the extreme stresses reported, suggesting that atomic-scale phenomena (e.g., intermixing and metastable phase formation at the interfaces) dominate. These findings highlight the importance of balancing bilayer counts and thickness-to-roughness ratios for reliable stress quantification, providing a practical pathway to designing and characterizing advanced nanocomposite coatings with improved accuracy.
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References
Preprint (Preprint where the data is discussed) Y. Hu, A. Sharma, A. Druzhinin, C. Cancellieri, V. Turlo, arXiv:2501.18247 (2025), doi: 10.48550/arXiv.2501.18247
Preprint (Preprint where the data is discussed) Y. Hu, A. Sharma, A. Druzhinin, C. Cancellieri, V. Turlo, arXiv:2501.18247 (2025)