Modulus mapping is a technique to map and display the mechanical properties of a material surface through joint actions of dynamic mechanical testing (nanoDMA) and in-situ SPM (scanning probe microscopy) imaging. A high frequency sinusoidal force is applied to the indenter probe while it is being raster scanned over a sample surface. The resultant displacement of the indenter probe at each pixel position then is analyzed for amplitude and phase lag from the dynamic force input signal. As a result, storage modulus, loss modulus and tangent delta of the material surface are quantified at each pixel position and displayed in a colored image.
Because of the inherited sensitivities of the nanoscale dynamic mechanical testing and scanning probe microscopy incorporated in the technique, modulus mapping has shown promises and advantages in rapidly characterizing and visualizing variation of mechanical properties at nanoscale over grain boundaries, interfaces, inter-phases, multiphase or multilayer composites, precipitates, and additives.
Typical Experimental Results:
Modulus Mapping of Metal-Coating Interface on partially coated wire
Complex Modulus Line Profile
|Dynamic Mechanical Analysis||Grain Boundaries||Heterogeneous Structures|
|Interfaces||Inter-Phases||Mechanical Property Mapping|
|Nanomaterials||Phase Image||Polymer Blend|
|Precipitates||Reinforced Materials||Scanning Probe Microscopy|
|Steels||Storage and Loss Modulus||Tangent Delta|
For more information please read our application notes.
Instruments: Multi-Technique and Full-Feature Nanoindentation System
|Temperature Range||5 to 300 °C|
|Displacement Resolution||0.02 nm|
|Force Range||30 nN to 10 mN|
|Force Resolution||1 nN|
|Frequency Range||1 to 300 Hz|
|Atmosphere||Open Air, Inert Gas|