This paper presents an experimental study of the influences of the type of diamond used during the test (mono-crystalline and polycrystalline) upon the material removal rate and surface roughness. Four grit sizes of each type of diamond were tested and the lapping time was varied. Finally, an optimization of the lapping process for the alumina ceramic is proposed. The research presented in this paper uses this process as a platform to study the micro machining of 99.9% alumina (Al{sub}2O{sub}3). The effect of abrasive size, abrasive type, load and lap time is analyzed with respect to surface roughness and material removal rate. Analysis consists of the measured effects of each of the varied parameter as well as visual examination and discussion of the wear processes witnessed with lapping operation.
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