Chemical Vapour Deposition of Diamond for Dental Tools and by Waqar Ahmed

By Waqar Ahmed

This quantity provides chemical vapour deposition of diamond motion pictures for program in slicing instruments, microdrills, dental burs and surgical instruments. It examines a variety of deposition ideas, discusses mechanisms of diamond progress and their impression on slicing instrument lifestyles and performance.

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Extra resources for Chemical Vapour Deposition of Diamond for Dental Tools and Burs

Sample text

17 shows the variation of Mach number at three inlets, outlet, and on the rotor surface for the rotational speed of the rotor of two million rpm. 01. 96. From the results it can be said that only at the outlet, the flow is transonic, as the velocity of the flow is maximum at the outlet because of zero pressure condition. At the inlets and on the rotor surfaces, the flow is found to be subsonic. An experimental high-speed spindle has been manufactured and is shown in Fig. 18. 18 at various inlet air pressures.

Pressure coefficient determines pressure variation exerted by high-speed compressed air on the rotor and for the optimum design of the rotor, the pressure coefficient should be as low as possible as the large values of pressure 26 2 Dental Tools, Human Tooth and Environment coefficient indicate high pressure variations, which could cause the severe imbalance of the load and deformation of the rotor and this generates failure of the rotor. Various designs of rotor for different rotational speeds are proposed and fluid analysis of rotors has been carried out with a computational fluid dynamics (CFD) software package called FLUENTTM.

Reproduced with permission. 15 Reproduced with permission. Copyright retained by Inderscience Publishers specified as 1e-6 and the maximum number of iterations specified for convergence control was 200. 2. 7 Variation of pressure coefficient with rotating speed of the rotor for different geometries of the rotor such as rotor with twelve blades, rotor with three inlets inclined at an angle of 30°, rotor with three inlets inclined at an angle of 45°, and rotor with three inlets and three outlets.

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