Diamond coating of tungsten carbide-cobalt (WC-Co) cemented carbide tools using chemical vapour deposition (CVD) requires removal the cobalt (Co) binder phase from WC-Co surface in order to improve adhesion. Laser ablation is shown be a promising technique for selective Co, which based on difference melting and boiling temperatures between different phases. However, laser with conventional nano...

In this article, a new WC- Al2O3 composite tool material is successfully fabricated by vacuum hot-pressed sintering process with high hardness and flexural strength as well fracture toughness, which solved the problem of mutual restriction between toughness existing WC-Co materials. By adding Al2O3, WC-based cemented carbide significantly improved, are also improved. The mode WC-Al2O3 composite...

The strength and ductility of microcrystalline and nanocrystalline tungstsen carbide–cobalt (WC–Co) cermets have been evaluated by employing a stored energy Kolsky bar apparatus, high-speed photography and digital image correlation. The test specimens were thin-walled tubular Al7075-T6 substrates 250 μm thick, coated with a 300 μm thick microcrystalline or nanocrystalline WC–Co layer with an av...