Peculiarities of Ruby Synthesized from Al2O3–Cr2O3 Powder Mixture by Selective Laser Sintering

The synthesis of ruby from an Al 2 O 3 -Cr 2 O 3 mixture compacted in pellets of different density by layer-by-layer selective laser sintering (SLS) has been investigated depending on the irradiation power and the traverse speed of a laser beam. It has been established that a formed track consists of crystallites textured: vertical texturing is inherent to volume layers and horizontal texturing is proper to surface layer. The morphology of the surface of the track is determined by the irradiation conditions.