Hits:

Indexed by:期刊论文

Date of Publication:2007-12-01

Journal:CHINESE PHYSICS

Included Journals:SCIE、EI、Scopus

Volume:16

Issue:12

Page Number:3790-3797

ISSN No.:1009-1963

Key Words:pulsed laser arc deposition; diamond-like carbon; tribological property; physical property

Abstract:A novel method, pulsed laser arc deposition combining the advantages of pulsed laser deposition and cathode vacuum arc techniques, was used to deposit the diamond-like carbon (DLC) nanofilms with different thicknesses. Spectroscopic ellipsometer, Auger electron spectroscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, atomic force microscopy, scanning electron microscopy and multi-functional friction and wear tester were employed to investigate the physical and tribological properties of the deposited films. The results show that the deposited films are amorphous and the sp(2), Sp(3) and C-O bonds at the top surface of the films are identified. The Raman peak intensity and surface roughness increase with increasing film thickness. Friction coefficients are about 0.1, 0.15, 0.18, when the film thicknesses are in the range of 17-21 nm, 30-57 nm, 67 123 nm, respectively. This is attributed to the united effects of substrate and surface roughness. The wear mechanism of DLC films is mainly abrasive wear when film thickness is in the range of 17 41 nm, while it transforms to abrasive and adhesive wear, when the film thickness lies between 72 and 123 nm.