V. Blank et al., NANO-SCLEROMETRY MEASUREMENTS OF SUPERHARD MATERIALS AND DIAMOND HARDNESS USING SCANNING FORCE MICROSCOPE WITH THE ULTRAHARD FULLERITE C-60TIP, Journal of materials research, 12(11), 1997, pp. 3109-3114
The new procedure for the hardness measurements of superhard materials
including diamond using the scanning force microscope with the ultrah
ard fullerite C-60 tip was developed. It is shown that diamond is plas
tically deformed under the indentation by the ultrahard fullerite inde
nter at room temperature, Now the correct measurements of diamond hard
ness have become possible, The hardness values measured are 137 +/- 6
and 167 +/- 5 GPa for the diamond faces (100) and (111), respectively.