Abstract
This chapter describes the surface engineering of tungsten carbide dental burs using vertical hot filament chemical vapour deposition (CVD) process. The nucleation and structure of the polycrystalline diamond films deposited onto the burs have been analysed using scanning electron microscope (SEM-EDX) and Raman spectroscopy. The film properties and performance of the coated burs are highly dependent on the growth parameters such as substrate preparation, bias voltage, substrate temperature, gas flow rates, the ratio of hydrogen and methane and the filament characteristics. The performance of the uncoated, conventional diamond dental and the CVD coated dental burs have been compared. The CVD coated burs have been shown to have superior performance in terms of wear and life than the uncoated and conventional burs.
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