Validation of crystallographic correlation for faceted morphology in laser surface engineered alumina ceramic

Surface modification of alumina ceramics using high energy-density lasers is associated with the formation of highly faceted pyramidal surface grains. Recently, we have developed a phenomenological crystallographic correlation that explains the faceted morphology by a (12¯10) texture. Based on high-resolution electron back-scattered diffraction, the present work proposes a precise correlation showing that faceting of surface grains is closely linked with the evolution of a texture with (23¯10) parallel to the surface and the (0 0 0 1) normal to the direction of laser treatment trace.