Selective Laser Melting of Molybdenum Alloy on Silicon Carbide Substrate

Additive manufacturing (AM) technologies allow for the creation of components with greater design flexibility. The complexity in geometry and composition can enhance functionality, while parts made from multiple materials have the capacity to deliver improved performance. Nonetheless, most multimaterial printing methods are still in their infancy and face numerous challenges. Numerous materials require individual post-treatment, and some may not be compatible with each other regarding shrinkage, melting or sintering temperatures, and interactions. In this study, we introduce a technique for producing a metal-ceramic multimaterial prototype for electronic packages through powder-bed additive manufacturing technology, specifically selective laser melting (SLM). A composite based on silicon carbide was created. The powder was removed from the chamber to prevent cross-contamination, and molybdenum-based powder was introduced. Molybdenum tracks with a diameter of 400μm and a length of 15mm were produced using SLM on a SiC layer. The results indicated that the SiC-based samples exhibit a relatively uniform microstructure with homogeneously distributed porosity. Mo-based powder containing 5% silicon was successfully SLM-ed on SiC layer. The surface of Mo layer surface is smooth with some cracks. The microstructure and chemical analysis of the layer was performed. The Vickers hardness was measured.