Nano-impact

A limitation of conventional nanoindentation testing is that the loading rate is too low (quasi-static indentation is another popular name for nanoindentation) to simulate the actual deformation rates occurring in a material’s operation or production. For many applications what product designers really need is reliable high strain rate data rather than quasi-static data. Realising this, Micro Materials have developed a fast indentation technique, nano-impact, to probe properties at high strain rates and investigate surface fatigue and fracture due to repetitive contact.....



Nano-Impact and Fatigue Measurements


....Single impacts with the pendulum impulse set-up can be used to measure dynamic hardness. For multiple impact tests, the time to failure, mechanism of failure, energy to failure, and probability of failure at a given load can all be studied.


MML offer two unique methods of nano-impact measurement

1. Sample Oscillation
The sample is oscillated by means of a piezoelectric oscillator.
2. Pendulum Impulse Impact
Using this method, the pendulum is pulled back and released to allow a controlled impact.




DIAMOND LIKE CARBON COATINGS

DLC films can be stressed and brittle limiting their suitability for some demanding applications. Nevertheless DLC has a wide range of attractive properties including high hardness and low friction so possible applications for this coating are being
continually investigated.


http://www.micromaterials.co.uk/word%20and%20pdf%20files/Impact.pdf