What is the difference between Microindentation and Nanoindentation?
Nanoindentation
Technical Notes
What is the difference between Microindentation and Nanoindentation?
Microindentation applies higher loads (mN–N range) using larger indenters, measuring hardness on a micrometer scale. Nanoindentation, with lower forces (µN–mN range) and sharper probes, evaluates nanometer-scale mechanical properties with higher precision. Nanoindentation is ideal for thin films and coatings, while microindentation suits bulk materials.
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100 nanoindentation measurements on a fused silica reference sample.
Most nanoindentation work for measurement of hardness and elastic modulus is performed using a three sided “Berkovich” indenter.
Many other indenter geometries are available for different test types.
The load-partial unload (multi-cycle) indentation technique allows for the rapid profiling of hardness and elastic modulus variation as a function of depth.
In this example, a 50-cycle test from 5 mN to 100 mN was performed on a 2 µm DLC coating on silicon. The inset plot shows decreasing hardness as the influence of the softer silicon substrate increases with increasing indentation depth.
Very low noise floor and thermal drift rates mean that high measurement accuracy is retained down to very small contact depths.
Here three samples with low friction coatings have been profiled down to contact depths of 5 nm.
Mechanical properties may be mapped across areas as small as 1μm² up to several cm².
In this case the elastic modulus of four calcite crystals of a Pinna Nobilis shell have been mapped over and area of 45 x 45 µm. The crystals of interest were first identified using EBSD, the sample was then transferred to the NanoTest Vantage and the region of interest targeted using the instrument’s integrated optical microscope.
Once tests are complete a full statistical analysis of the results is possible within the NanoTest™ Vantage™ software.
A wide range of other tests are also possible using instrumented indentation, these include:
Micro-pillar compression
Micro-cantilever bend tests
Fibre push-out tests
Adhesion tests (pull-off force)
Particulate compression tests
This example demonstrates micro-pillar compression of an IN718 superalloy. Tests were performed in displacement rate controlled mode and load-drop events are seen in response to transient deformation events in the pillar.
High load testing to 30N
Technical Notes
Computational modelling
Technical Notes
Acoustic emission
Technical Notes
Electrical contact resistance
Technical Notes
Dynamic Mechanical Compliance testing
Technical Notes
Multiscale mechanical property mapping
Application Notes
Indentation creep
Application Notes
High temperature creep resistance
Application Notes
Explore More
To further enhance your experience and understanding, we invite you to check out the following pages on our website that we believe are essential to your journey with us:
- High-Temperature Nanoindentation Testing for Advanced Material Characterization
- Advanced Nano Scratch and Wear Testing for Coatings and Materials
- Nano-Impact Testing for Advanced Material Performance in High-Stress Applications
These pages offer valuable insights and resources to help you achieve your goals.