In the quest to design and develop new devices and applications, understanding the micro-mechanical properties of materials is paramount. This is true not only for standard materials like metals but also for softer substances such as polymers, biological samples, and even artifacts of historical significance. A recent study published in the journal ‘Materials & Design’ (or ‘Material- und Gestaltungslehre’ in German) introduces a novel approach to measuring material hardness and Young’s modulus at incredibly small scales, potentially revolutionizing the energy sector and beyond.
Atomic force microscopy (AFM) indentation has emerged as a promising technique, offering superior imaging capabilities without the need for expensive in-situ measurements with electron microscopy. However, the analysis methods used with AFM-indentation, such as Hertzian contact mechanics and Sneddon theory, often rely on spherical indenters. This is where the work of Stanislav Zak, a researcher at the Chair of Material Physics at Montanuniversität Leoben in Austria, comes into play.
Zak and his team have developed a modified Oliver-Pharr method combined with tip area calibration through sample hardness. This approach introduces a new parameter, β, which is a function of cantilever deflection. “Our method offers additional improvements, such as the unification of deep and shallow indents and the possibility of more localized deformation,” Zak explains. This innovation could lead to more precise and efficient material testing, ultimately benefiting industries that rely on advanced materials, including the energy sector.
The researchers verified their approach on a range of materials, from soft epoxy-silicon and polycarbonate to hard fused quartz and Ni. The promising results suggest that this method could become a standard in material science, particularly for applications requiring high precision and localized deformation analysis.
The implications of this research are significant. In the energy sector, for instance, understanding the micro-mechanical properties of materials used in batteries, solar panels, and other energy devices can lead to improved performance and durability. “By providing a more accurate and efficient way to measure material properties, our method can contribute to the development of better energy solutions,” Zak notes.
Moreover, the ability to analyze both deep and shallow indents with a single method streamlines the testing process, reducing costs and time. This efficiency is crucial for industries that need to quickly and accurately assess the quality and performance of their materials.
As the demand for advanced materials continues to grow, so does the need for innovative testing methods. Zak’s research represents a significant step forward in this field, offering a more precise and efficient way to measure material properties. With further development and application, this method could become a cornerstone of material science, shaping the future of various industries, including energy.
The study, published in ‘Materials & Design’, highlights the potential of AFM-indentation combined with the modified Oliver-Pharr method. As the energy sector and other industries continue to evolve, the need for accurate and efficient material testing will only increase. Zak’s work provides a compelling solution, paving the way for future advancements in material science and technology.