Abstract
Direct writing is a rapidly developing manufacturing technology that is convenient, adaptable and automated. It has been used in energetic composites to manufacture complex structures, improve product safety, and reduce waste. This work is aimed at probing the formability properties and combustion performances of aluminum/ammonium perchlorate with a high solid content for direct writing fabrication. Four kinds of samples with different solid content were successfully printed by adjusting printing parameters and inks formulas with excellent rheological behavior and combustion properties. A high solid content of 91% was manufactured and facile processed into complex structures. Micromorphology, rheology, density, burning rate, heat of combustion and combustion performance were evaluated to characterized four kinds of samples. As the solid content increases, the density, burning rate and heat of combustion are greatly enhanced. Based on 3D direct writing technology, complex energetic 3D structures with 91% solid content are shaped easier and more flexibly than in traditional manufacturing process, which provides a novel way for the manufacture of complicated structures of energetic components.
Highlights
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; Citation: Deng, Y.; Wu, X.; Deng, P.; Abstract: Direct writing is a rapidly developing manufacturing technology that is convenient, adaptable and automated
This was externally connected to a high-purity nitrogen gas cylinder, and the output pressure of the air pump was adjusted to 30~50 psi
Hydroxyl-terminated polybutadiene (HTPB) were added to ethyl acetate; (b) ammonium perchlorate composite powder (Al/AP) was added to the binder solution; (c) stir all components for 4 hours; (d) transfer the stirred slurry to the syringe; (e) install the syringe on the 3D
Summary
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; Citation: Deng, Y.; Wu, X.; Deng, P.; Abstract: Direct writing is a rapidly developing manufacturing technology that is convenient, adaptable and automated. It has been used in energetic composites to manufacture complex structures, improve product safety, and reduce waste. Energetic materials present a high energy density and rapid energy release properties, and are sensitive to energy stimulation [1] It is precisely because of these characteristics that the manufacture of energetic materials has always been an attraction for scientific researchers.
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