Abstract
Diamond-like carbon (DLC) coatings were successfully deposited on carbon nanotube (CNT) films with CNT densities of 1 × 109/cm2, 3 × 109/cm2, and 7 × 109/cm2 by a radio frequency plasma-enhanced chemical vapor deposition (CVD). The new composite films consisting of CNT/DLC were synthesized to improve the mechanical properties of DLC coatings especially for toughness. To compare those of the CNT/DLC composite films, the deposition of a DLC coating on a silicon oxide substrate was also carried out. A dynamic ultra micro hardness tester and a ball-on-disk type friction tester were used to investigate the mechanical properties of the CNT/DLC composite films. A scanning electron microscopic (SEM) image of the indentation region of the CNT/DLC composite film showed a triangle shape of the indenter, however, chippings of the DLC coating were observed in the indentation region. This result suggests the improvement of the toughness of the CNT/DLC composite films. The elastic modulus and dynamic hardness of the CNT/DLC composite films decreased linearly with the increase of their CNT density. Friction coefficients of all the CNT/DLC composite films were close to that of the DLC coating.
| Original language | English |
|---|---|
| Pages (from-to) | 1940-1944 |
| Number of pages | 5 |
| Journal | Diamond and Related Materials |
| Volume | 16 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2007 |
Keywords
- Carbon nanotube
- Composite film
- Diamond-like carbon
- Friction
- Hardness
- Toughening
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Chemistry(all)
- Mechanical Engineering
- Materials Chemistry
- Electrical and Electronic Engineering