Nanomechanics and Tribology

Nanotribometer, Hysitron Picoindenter, Surface Profilometer, Pin-on-Disk

NanomechanicsNanomechanics is the study of the mechanical properties of material bodies whose dimensions lie in the nanometer to micrometer scale. Some properties of interest are Young and shear moduli, shear strength, and work of adhesion, and yield strength. Tribology involves the study of friction, wear, and lubrication at sliding contacts.

Instruments at LASST that can probe mechanical properties of surfaces and films include:

UHV AFM Nano-Indentor – combined Atomic Force Microscope (AFM), Scanning Tunneling Microscope (STM), and Field Ion Microscope (FIM) in one instrument using a well-defined probe tip and atomically clean surfaces.

NanoTribometer Metrology System – AFM type force detection with a high precision metrology stage to measure forces in the milliNewton range with micrometer sized sliding contacts

Hysitron Picoindenter – load versus indentation measurements using a Berkowitch diamond probe and capacitive force detection

M5 Scanning Force Microscope – used to perform single line scratch tests and nanometer scale deformation studies

new_tribo_2Pin-on-Disk Tester – measurements of friction and wear in circular scratch geometry

Vitrodyne V-1000 microtensile tester – tensile or compression testing using a 150 gram load cell and 75 mm travel with 1 micron length resolution.

Alpha-Step Surface Profilometer – surface roughness measured with a diamond stylus over 500 micrometers with 1 nanometer vertical resolution