Crack generation and the effect of in-process electro-discharge dressing in grinding single crystal MgO

Abstract

Single crystal MgO is widely used in material with high temperature resistance, but is difficult to grind because of brittleness and crack generation. Therefore, a diamond wheel with superabrasive surface is required for surface grinding of this material. But the conventional dressing method cannot be applied to the diamond wheel with superabrasive. This study describes a newly proposed method for carrying out effective in-process electro-discharge dressing (IEDD) of a diamond wheel with superabrasive. Using IEDD, the surface roughness of single crystal MgO was improved, the grinding force was very low and crack generation was reduced. IEDD is a good method to obtain efficient grinding and surface grinding of single crystal MgO.