Hardness, elastic modulus, and structure of very hard carbon films produced by cathodicarc deposition with substrate pulse biasing Academic Article uri icon


  • The hardness, elastic modulus, and structure of several amorphous carbon films on silicon prepared by cathodic-arc deposition with substrate pulse biasing have been examined using nanoindentation, energy loss spectroscopy (EELS), and cross-sectional transmission electron microscopy. EELS analysis shows that the highest sp3 contents (85%) and densities (3.00 g/cm3) are achieved at incident ion energies of around 120 eV. The hardness and elastic modulus of the films with the highest sp3 contents are at least 59 and 400 GPa, respectively. These values are conservative lower estimates due to substrate influences on the nanoindentation measurements. The films are predominantly amorphous with a 20 nm surface layer which is structurally different and softer than the bulk. 1996 American Institute of Physics.

published proceedings

  • Applied Physics Letters

altmetric score

  • 3.25

author list (cited authors)

  • Pharr, G. M., Callahan, D. L., McAdams, S. D., Tsui, T. Y., Anders, S., Anders, A., ... Robertson, J.

citation count

  • 236

complete list of authors

  • Pharr, George M||Callahan, Daniel L||McAdams, Shaun D||Tsui, Ting Y||Anders, Simone||Anders, AndrĂ©||Ager, Joel W||Brown, Ian G||Bhatia, C Singh||Silva, SRP||Robertson, John

publication date

  • February 1996