A new design of tungsten carbide tools with diamond coatings
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916 (United States)
- Metals and Ceramics Division, Oak Ridge, National Laboratory, Oak Ridge, Tennessee 37831 (United States)
We have designed tungsten carbide tools with a new binder, which makes them suitable for advanced diamond tool coatings. The new tool substrates, made of tungsten carbide and nickel aluminide as binder phase, are produced by sintering and hot isostatic pressing, and also by combustion synthesis. The high temperature strength of nickel aluminide is key to superior tool performance at elevated temperatures. More importantly, nickel aluminides reduce the formation of graphite and promote diamond growth during chemical vapor deposition. Diamond films are deposited on the new tool substrates to investigate the nucleation density, adhesion, and wear resistance. The diamond coatings are characterized by scanning electron microscopy and Raman spectroscopy. The graphitizing tendency due to cobalt in the tungsten carbide tools was found to be a limitation to improve adhesion of diamond films. The new tool substrates with nickel aluminide binder have been found to exhibit good adhesion and wear resistance. The implications of these results in advanced cutting tools are discussed. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 385542
- Journal Information:
- Journal of Materials Research, Vol. 11, Issue 9; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nucleation and adhesion of diamond films on Co cemented tungsten carbide
The role of cemented WC substrate morphology on the diamond film growth and cracking resistance