|About this Abstract
||Materials Science & Technology 2019
||Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
||Design-Processing-Properties of Alternating/Multi-Layered, Metal-ceramic Composites Fabricated via Laser-based Additive Manufacturing
||Kellen D. Traxel, Amit Bandyopadhyay
|On-Site Speaker (Planned)
||Kellen D. Traxel
Manufacturing techniques for impact-resistant engineering structures are challenged to achieve high process-flexibility, complex geometries, and accommodate diverse material systems, typically resulting in multi-step processes. Laser-based additive manufacturing (AM), however, can realize these composites in a single processing step by adjusting the deposited feedstock powder and processing parameters. To this end, we investigate alternating-material deposition, a customizable single-step technique for fabricating metal-ceramic composites with directionally-tailored properties. This approach exploits the layer-by-layer nature of additive manufacturing to combine uniquely-reinforced and distinct regions with different properties of the precursor materials. To demonstrate, a titanium (CPTi)-niobium carbide (NbC) alternating-material composite is fabricated, exhibiting as high as 40% directional-difference in elastic-compressive modulus and 15% directional-difference in thermal diffusivity. The microstructure revealed a ribbon-like metal-ceramic structure with unique properties and crack-arrest capability compared to traditionally-processed composites. It is envisioned that this manufacturing platform can transform next-generation of structural design based on location specific performance.