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Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
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Rheological and Mechanical Characterization of 3D-Printable Solid Propellant Slurry.

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Summary
This summary is machine-generated.

This study explores 3D-printable composite solid propellants using ammonium sulfate. Pre-heating reduces viscosity for 3D printing while maintaining essential mechanical properties.

Keywords:
additive manufacturingcomposite solid propellantphoto-polymerizationpolybutadienepolymer chemistryrheology

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Propulsion Technology

Background:

  • Development of advanced composite solid propellants is crucial for modern rocketry.
  • 3D printing offers novel manufacturing possibilities for energetic materials.
  • Investigating inert oxidizer replacements is key for safer propellant formulations.

Purpose of the Study:

  • To characterize the rheological and mechanical properties of a 3D-printable composite solid propellant.
  • To evaluate the effect of UV curing and pre-heating on propellant performance.
  • To assess the feasibility of using ammonium sulfate as an inert oxidizer replacement.

Main Methods:

  • Formulation of a composite solid propellant with 80% wt solids loading using polybutadiene binder and ammonium sulfate.
  • Utilizing an in-house UV-A LED illumination system (385 nm) for curing.
  • Conducting rheological (viscosity) and mechanical (uniaxial tensile and compression) tests.

Main Results:

  • Viscosity reduction was observed for pre-heated slurry formulations.
  • Mechanical properties (tensile strength and strain, compression) remained consistent with prior research.
  • Temperature and solid loading percentage were identified as critical factors influencing properties.

Conclusions:

  • Pre-heating resin composites can effectively reduce viscosity for 3D printing.
  • The developed propellant formulation shows promise for 3D printing applications.
  • Findings support the development of a 3D printer prototype for composite solid propellants.