[T14] High Temperature Materials

[15F-T14-07] Comparative Analysis of Laser Parameters, Pure Titanium, and Titanium Alloy Effects on Dendrite Growth in TiOS₂-Ceramic

*A. Ullah^{1, 2}, K. Asami¹, K. Azher³, C. Emmelman¹ (1.Hamburg University of Technology, Germany, 2.RMITUniversity, Australia, 3.King Fahd University of Petroleum & Minerals, Saudi Arabia)

Keywords:Additive Manufacturing, Selective Laser Melting, Surface Morphology, Dendrites, Microstructures

Despite several challenges, Powder-Bed Fusion – Laser Beam (PBF-LB) for ceramics remains a promising fabrication method. This research focuses on the intricate-relationship between laser parameters, the influence of pure titanium and titanium alloy additives on the fabrication of TiO2-based ceramics, and the resultant microstructural aspects, with a particular emphasis on dendritic growth and solidification defects. Changing laser parameters were found to have a substantial impact on the dendrite-growth and solidification rate of TiO₂ compared to the variations in material additives. The change in the scanning strategy has no obvious effect on the surface-morphology and dendrite formation. Incorporating a small quantity of metal powders into TiO2 exhibited a positive influence, notably reducing part defects. However, the results support that the addition of pure titanium showed a relatively favorable influence, enhancing the melting-state of TiO2 and yielding a smooth-surface with reduced defects. Conversely, the addition of Ti64 led to the formation of defects.