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US 2016/0237548 A1Published application
Pvd coated polycrystalline diamond and applications thereof
AssigneeKennametal Inc.
InventorsFabian ROSENBERGER, Armin Josef ZIMMERMANN, Emmanuel EP. PUVILAND
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Abstract
In one aspect, cutting tools are described herein employing PCD substrates having coatings applied thereto. A cutting tool, for example, comprises one or more cutting edges including a PCD substrate and a diamond-like carbon coating adhered to the PCD substrate, the diamond-like carbon coating having hardness greater than 4000 HV0.05. In some embodiments, the diamond-like carbon coating has a thickness greater than 0.3 μm and a sp3 fraction of at least 0.85.
Claims23
A cutting tool comprising:
- one or more cutting edges including a polycrystalline diamond substrate and a diamond-like carbon coating adhered to the polycrystalline diamond substrate, the diamond-like carbon coating having hardness greater than 4000 HV0.05.
A method of making a cutting tool comprising:
- providing a polycrystalline diamond substrate of one or more cutting edges of the cutting tool and depositing a diamond-like carbon coating over the polycrystalline diamond substrate by physical vapor deposition, the diamond-like carbon coating having hardness greater than 4000 HV0.05.
Dependencies are inferred from the claim text.