Bias enhanced growth of diamond on coarse and micrograin cemented carbide. (29th January 2007)

• Record Type: Journal Article
• Authors: Cabral, Gil; Titus, Elby; Gracio, J.
• Is Part Of: International journal of nanomanufacturing. Volume 1:Number 2(2006)
• Page Start: 259
• Page End: 271
• Publication Date: 2007-01-29
• Subjects: chemical vapour deposition -- CVD -- diamond nucleation -- cemented carbides -- microstructure -- secondary nucleation -- tungsten carbide substrates -- bias-enhanced growth -- diamond grains -- cobalt-cemented tungsten carbide -- polycrystalline diamond thin films -- nanomanufacturing; Nanostructured materials industry -- Periodicals; Nanotechnology -- Periodicals; 620.505
• Languages: English
• ISSNs: 1746-9392

Abstract

Ultra-fine diamond grains were deposited directly onto Co-cemented tungsten carbide (WC-Co) substrates via plasma-enhanced hot-filament Chemical Vapour Deposition (CVD), using a parallel molybdenum plate. It was employed a Bias-Enhanced Growth (BEG) process at different times, 15, 20, 25 and 30 min, for the self nucleation of diamond grains. The ultra-fine crystallinity, smoothness and purity of diamond grains were characterised using, Scanning Electron Microscopy (SEM), Atomic Force Microscope (AFM) and Raman spectroscopy. The diamond nucleation on micro and coarse grain WC-Co substrates was compared using SEM analysis.