Zong Hu-Zeng, Zhang Peng, Yao Jing-Xiao, Hao Ga-Zi, Wang Su-Wei, Zhang Guang-Pu, Ren Hao, Xiao Lei, Jiang Wei
National Special Superfine Powder Engineering Technology Research Center, Nanjing University of Science and Technology, Nanjing, China.
Shanxi Jiangyang Chemical Co., Ltd, Taiyuan, China.
3D Print Addit Manuf. 2024 Jun 18;11(3):e1394-e1406. doi: 10.1089/3dp.2022.0245. eCollection 2024 Jun.
In recent years, the application of 3D printing technology in the energetic materials field has proved its ability to innovate traditional charging methods and fabricate complex structures to improve combustion/detonation performance. The melt extrusion technology is the most promising way to fabricate complex structures and multiple components of melt-cast explosives. In this study, a paraffine-based composite was used to substitute melt-cast explosives, and a Design of Experiments approach based on central composite design was adopted to investigate the influence of layer thickness, percent infill, extrusion temperature, and printing velocity on the roughness of printed samples. The results showed that layer thickness and printing velocity could significantly influence the roughness of printed specimens, and no obvious voids or cracks inside the specimens can be detected in computed tomography. In addition, a composite-shaped grain was successfully fabricated via the EAM-D-1 printer, which proved the feasibility of 3D printing melt-cast explosives with complex structures. This work will greatly help to achieve 3D printing melt-cast explosives with complex structures and higher accuracy.
近年来，3D打印技术在含能材料领域的应用已证明其有能力革新传统装药方法，并制造复杂结构以提高燃烧/爆轰性能。熔体挤出技术是制造熔铸炸药复杂结构和多个组件最具前景的方法。在本研究中，使用石蜡基复合材料替代熔铸炸药，并采用基于中心复合设计的实验设计方法，研究层厚、填充率、挤出温度和打印速度对打印样品粗糙度的影响。结果表明，层厚和打印速度会显著影响打印试样的粗糙度，并且在计算机断层扫描中未检测到试样内部有明显的孔隙或裂纹。此外，通过EAM-D-1打印机成功制造出了复合形状药柱，这证明了3D打印具有复杂结构的熔铸炸药的可行性。这项工作将极大地有助于实现具有复杂结构和更高精度的3D打印熔铸炸药。
