Monocrystalline diamond lapping

As the contracting company (Warren Diamond Co.) is a member company, we can identify it as the primary beneficiary. The project s main goal is to optimize the lapping process, by finding a correlation between the process parameters (of which very important is the type of the slurry) and the final parameters of the ceramic parts (dimensional accuracy and surface roughness). Therefore, a part of the optimization process is concerned with a comparative study of the behavior of polycrystalline versus monocrystalline diamond slurry. The aspects that will be taken into account are the MRR and the grain size distribution. 

Grain size distribution for 25 j.m monocrystalline diamond (a) before lapping (b) after lapping. 

Diamond abrasive was suspended in a water-based carrier and supplied by a peristaltic pump at a flow rate of 1.5 mL/min. Three workpieces, fixed at the bottom of a weight with a holder, were lapped simultaneously. The slurry was based on either monocrystalline or polycrystalline diamond grains of four sizes 25,15, 3, and 1 pm. 

An important component of these lapping tests is the evaluation of the performance of monocrystalline and polycrystalline diamond slurry. In... 

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