| Autor: |
Zong, Huzeng, Guo, Chao, Wang, Zehao, Guo, Rui, Zhou, Hao, Hao, Gazi, Ren, Hao, Xiao, Lei, Jiang, Wei |
| Předmět: |
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| Zdroj: |
Journal of Energetic Materials; 2024, Vol. 42 Issue 4, p543-561, 19p |
| Abstrakt: |
The 3D printing (or additive manufacturing) of energetic materials (EMs) has gained attention due to its innovative manufacturing method and excellent performance of products. To explore the application of 3D printing technology in melt-cast explosives, a fused deposition modeling (FDM) 3D printer was developed to fabricate TNT/HMX-based explosive grains (φ20 mm×20 mm) that were composed of 60 wt.% TNT and 40 wt.% superfine HMX. The influences of printing speed, printing temperature, and layer thickness on the printed grains were investigated by factorial design experiments. According to the printing process, the formation mechanism of FDM 3D-printed TNT/HMX-based explosives was explored and proposed, which mainly included extruded, contacted, micro-fused and solidified, and bonded. Then, a series of characterization methods were used to investigate the morphology and structure of the printed grains. The tested results showed that the density of the printed grains reached 98.6% of the theoretical density, and the compressive strength and tensile strength of printed grains were 87.5% and 66.7% higher than the cast ones, respectively, which indicated the printed grains have higher density and mechanical performance. This work was expected to provide a valuable idea and basis for the 3D printed melt-cast explosives with complex structure and high performance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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