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Indentation
technology is based on high precision instruments used for the determination
of mechanical properties of thin films, coatings and substrates. Properties
such as hardness and elastic modulus can be determined on almost any type of
material: soft, hard, brittle or ductile. The operating principle of the
instrument is as follows: An indenter tip, normal to the sample surface, is
driven into the sample by applying an increasing load up to some preset value.
The load is then gradually decreased until partial or complete relaxation of
the material.
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Instruments measure the applied force and depth dynamically during a
load-unload cycle. The Hardness and Elastic Modulus are calculated directly
from the resultant force-displacement curve. |
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