The aim of this study was to evaluate cure depth of two nano-hybrid low-shrinkage bulk-fill resin based composite materials using the Vickers
hardness test 24 hours post-cure.
The principle of the
hardness test is that the depth of indentation depends on the hardness of the material.
In achieving this goal, Nanovea has also brought full automation to this type of mechanical
hardness test for the first time.
These tests differ from impact and
hardness tests in that applied force is absorbed slowly.
The difference in these hardness results was due to the difference in indentor geometry for these
hardness tests.
Pencil hardness is a very common
hardness test for organic coatings (ASTM D 3363).
However, for an HRC
hardness test, the indentation process includes plastic deformation.
Using a standard pencil
hardness test, the Validity sensor continues to perform flawlessly after repeated scratches with a 6H pencil, much higher than competitive solutions.
The Elcometer 3045 Persoz & Konig Pendulum Hardness Tester can be used with either pendulum type and this tester has a number of unique features designed to maximise repeatability and reproducibility of the pendulum
hardness test method.
One of the most common causes of test variation results from the Brinell
Hardness Test technique employed by the operator.
This method, which is only used nowadays for very large specimens such as steel forgings or rolls, is considered an indentation
hardness test since the hammer penetrates the specimen, albeit with both elastic and plastic deformation components.
The WJN-HCU software offers unrestricted test parameter definition, and any measurement application can be defined in Excel, resulting in significantly more information about a material than can be obtained using a conventional
hardness test instrument.
