Multiple ceramic layers keep Co/WC knife edges sharper.(SURFACE ENGINEERING)

Advanced Materials & Processes,  May, 2005  

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Multiple ceramic layers consisting mainly of titanium nitride reinforced with nanomaterials have been developed to coat knife blades made of tungsten carbide and cobalt, reports the Fraunhofer Institute for Environmental, Safety, and Energy Technology, Germany, in collaboration with Kennametal Widia, also of Germany.

To prevent this thin hard layer from splitting away from the body on cutting, the researchers harden its surface and thus increase the bonding between the two materials. "In contrast to traditional cutting tools, our concept provides extremely stable knives that ...

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