Cornell Center for Materials Research

Micro Hardness Tester

Kimball Hall 310

 

 

John Sinnott
Office (607) 255-3371
Cell (607) 592-8996
jps39@cornell.edu
B-57 Bard Hall


Microphotonics

operates on the following principle: an indenter tip with a known geometry is driven into the sample by applying an increasing load to some preset value. The load is then gradually decreased until relaxation of the sample has occurred. The load and displacement are recorded continuously throughout this process to produce a load-displacement curve from which the micro-mechanical properties such as hardness, Young's modulus, stress-strain studies, time dependant creep measurement, fracture toughness, and plastic and elastic energy of the sample can be calculated. The MHT covers a wide load range from 10 mN to 30 N. This load range will permit measurements of coatings down to 1 or 2 microns without the being influenced by the substrate material. Standard micro-hardness tests such as fracture toughness can now be made in a dynamic mode since the depth curve for some materials will show the initiation of cracking in the material
 
Edited on: 26 May 2009 5:38 pm