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Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
Published on: December 2, 2022
Mechanical properties of multilayered films using different nanoindenters
Te-Hua Fang1, Tong Hong Wang, Jia-Hung Wu
1Institute of Mechanical and Electromechanical Engineering, National Formosa University, Yunlin 632, Taiwan.
Journal of Nanoscience and Nanotechnology
|December 7, 2010
Summary
Molecular dynamics simulations revealed that spherical indenters require the most force on Al/Ni films. The study details film deformation, adhesion, and interface behavior during nanoindentation.
Area of Science:
- Materials Science
- Nanotechnology
- Computational Physics
Background:
- Understanding the mechanical properties of multilayered films is crucial for advanced material applications.
- Nanoindentation is a key technique for characterizing thin film mechanical behavior.
- Al/Ni multilayered films possess unique properties relevant to various technological fields.
Purpose of the Study:
- To investigate the effects of interface, contact hardness, deformation, and adhesion in Al/Ni multilayered films.
- To compare the nanoindentation response of different indenter geometries (sphere, cone, Vickers, Berkovich).
- To analyze the underlying deformation mechanisms at the nanoscale.
Main Methods:
- Molecular dynamics (MD) simulations were employed to model the nanoindentation process.
- Simulations included varying indenter shapes and analyzing film responses.
- Key parameters such as indentation force, deformation, and adhesion were monitored.
Main Results:
- The spherical indenter exhibited the largest indentation force at equivalent penetration depths.
- Film behavior included force increase during loading, relaxation at constant depth, and adhesion during unloading.
- Interface slip occurred along {111} (110) slip systems with glide bands up to 1 nm wide.
Conclusions:
- The study provides insights into the nanoscale mechanical response of Al/Ni multilayered films.
- Indenter geometry significantly influences the measured mechanical properties.
- MD simulations are effective for elucidating deformation mechanisms and interface phenomena in nanostructured materials.
