Abstract
Grinding the surface of ceramic components inevitably introduces micro-damage in their near-surface region. Surface damage appears in the form of surface roughness, residual stresses, and distributions of microcracks. Microcracks generated by surface grinding are of three kinds: lateral, median, and radial cracks. Lateral cracks run parallel to the surface, and are responsible for material removal. Median and radial cracks extend normally to the surface into the bulk, with the former running parallel to the grinding direction, and the latter extending normally to it. Median cracks are the deepest of the two, and are responsible for degradation of the surface fracture properties. A method for the non-destructive characterization of surface crack distributions in brittle materials is, therefore, much needed.
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