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Additive Manufacturing Utilizing a Novel In-Line Mixing System for Design of Functionally Graded Ceramic Composites

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Technical Report,01 Jul 2018,30 Sep 2019

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CCDC Army Research Laboratory Aberdeen Proving Ground United States

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Additive manufacturing is being explored as a processing technique to research and develop functionally graded ceramic composites. This report highlights the development of a direct ink writing system with multimaterial and in-line mixing capabilities for printing inks composed of high solids-loaded ceramic particulate suspensions. The custom direct ink writing system has two primary components, the print head and the feed system, and interfaces with a low-cost fused-deposition modeling 3-D printer. The feed system inputs ceramic ink to the print head at a specified composition. The print head uses an auger to mix and extrude multiple inks through a single nozzle. Precise conveyance is achieved via the auger, resulting in an improved startstop response over syringe-based direct ink writing systems. Additionally, in-line mixing uniquely enables the formation of composition gradients. Silicon carbide and boron carbide composites were successfully printed with layered and gradient structures.

Subject Categories:

  • Laminates and Composite Materials
  • Ceramics, Refractories and Glass
  • Manufacturing and Industrial Engineering and Control of Production Systems

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