Determination of the Optimal Mode of laser Melting With Surface Morphology Analysis and Identification of Microstructural Defects for Created SLM 3D Printing Parts Made of Alumina and Zirconia Stabilized by Yttria

摘要

Optimal laser processing parameters searching has been performed for ceramic powder 3D printing. The alumina powder and zirconia were taken as a mixture of ceramic powder. The selection has been done by varying the scanning speed, laser power, and scanning strategy. An experimental installation with a laser radiation source (Nd: YAG laser) with a maximum output power of 300 W and a focal spot of 50-200 μm has been used. It is shown that the quality of fusion depends to a great extent on the dynamics of the processes proceeding: the rate of energy input from the laser should correspond to the melting speed of the required amount of ceramics and its subsequent crystallization.