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Sclerometer

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sclerometer [sklə′räm·əd·ər]
(engineering)
An instrument used to determine the hardness of a material by measuring the pressure needed to scratch or indent a surface with a diamond point.
sclerometer
An instrument for determining the degree of hardness of a material by the amount of pressure required to scratch it with a diamond point.
Sclerometer 

an instrument for measuring the hardness of metals and various crystals. Most sclerometers fall into one of two categories. In the first type, designed by the German scientist A. Martens, the material tested is scratched with a diamond point under a load. The second type of instrument tests the resistance of a material to indentation. The hardness of the material is taken as either the load under which a scratch of a certain width is left or else the load under which an indentation of a given area is left on the material.
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On the other hand, others employ more instrumented devices like the "scratching machine," (14-17) Taber test and pin-on-disc machine, (7,18) Ford five-finger test, (8,19-21) single-pass pendulum sclerometer, (2-4,22) scratch apparatus, (23) Revetest scratch tester, (24) needle test, (25) scratch test rig, (9) in-house scratch test apparatus (26) and the "scratch tester.
An integrated approach towards the study of scratch damage of polymer by Sue, H.-J. / JCT Research
Lamy (9) utilized a pendular sclerometer to investigate the ductile to brittle transitions in the scratch deformation of a range of materials, including PMMA.
Scratch hardness and deformation maps for polycarbonate and ... by Briscoe, Brian J.; Pelillo, Enrico; Sinha, Sujeet K. / Polymer Engineering and Science
 
 
 
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