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Hardness, elastic modulus, and structure of very hard carbon films produced by cathodic-arc deposition with substrate pulse biasing

Pharr, GM, Callahan, DL, McAdams, SD, Tsui, TY, Anders, S, Anders, A, Ager, JW, Brown, IG, Bhatia, CS, Silva, SRP and Robertson, J (1996) Hardness, elastic modulus, and structure of very hard carbon films produced by cathodic-arc deposition with substrate pulse biasing APPLIED PHYSICS LETTERS, 68 (6). 779 - 781. ISSN 0003-6951

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Applied, Physics, DIAMOND-LIKE CARBON, AMORPHOUS-CARBON
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Melanie Hughes
Date Deposited: 29 Sep 2010 09:00
Last Modified: 23 Sep 2013 18:38
URI: http://epubs.surrey.ac.uk/id/eprint/2372

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