Materials Research Science and Engineering Center: Faculty Publications

KrF excimer laser-assisted combustion-flame deposition of diamond films

Y.X. Han, University of Nebraska - Lincoln
Hao Ling, University of Nebraska - Lincoln
Yongfeng Lu, University of Nebraska - Lincoln

Document Type Article

Published in JOURNAL OF APPLIED PHYSICS 100, 124911 2006. © 2006 American Institute of Physics. Used by permission.

Abstract

Cobalt (Co) composition has detrimental effects on the deposition of diamond films on cemented tungsten carbide (WC-Co) substrates. It decreases adhesion of the deposited films to the substrates and causes a transformation of sp3-bonded diamond to sp2-bonded graphite. In this study, a KrF excimer laser with a wavelength of 248 nm, a pulse width of 23 ns, and a pulse energy range of 84–450 mJ was used in the combustion-flame method to improve the quality of the deposited diamond films. Scanning electron microscopy, energy dispersive x-ray analysis, and Raman spectroscopy of the deposited films showed that a laser irradiation during combustion-flame deposition of diamond decreased the cobalt composition drastically. Based on the experimental results, the influence of the laser irradiation on the deposition process was analyzed.

This paper has been withdrawn.