摘要
针对传统工艺无法制备复杂结构发射药的问题,为探索提高发射药燃面渐增性新途径,采用3D直写打印技术,设计并打印了具有较高燃面渐增性的硝化棉基内嵌多方孔发射药。对3D打印的硝化棉基内嵌多方孔发射药进行了定容燃烧和内弹道性能表征。结果表明,以硝化棉、含能增塑剂和溶剂配制的浆料为打印物料,打印的硝化棉基内嵌多方孔发射药符合设计的燃面渐增性燃烧预期;受打印针头直径、溶棉比、醇酮比、溶剂挥发速度等因素的影响,直写打印的发射药设计尺寸和实际尺寸有一定偏差;12.7 mm机枪弹道初步试验表明,内嵌多方孔NC‐120发射药和制式D‐4/7混合装药16 g,装药比例1∶1时,膛压为314.2 MPa,射击初速为854.1 m·s^(-1),实现了直写打印内嵌多方孔发射药在膛内正常、稳定燃烧,达到了与制式发射药相似的水平,但充分利用直写打印内嵌多方孔发射药需要进一步优化设计药形、弧厚、内外层弧厚匹配等参数。
In order to solve the dilemma of traditional technology to prepare gun propellants with complex structure and explore a new way to improve incremental combustion surface of gun propellants,3D direct ink-writing was used to design and print nitrocellulose-based gun propellants embedded with multi-cubic pores.The 3D printed nitrocellulose-based gun propellants em-bedded with multi-cubic pores were characterized by constant volume combustion and internal ballistic properties.The results show that the printed nitrocellulose-based gun propellants embedded with multi-cubic pores,prepared by nitrocellulose,energetic plasticizer,and solvent as printing materials,are in accordance with the expected design of incremental combustion surface.Due to the influence of the diameter of printing needle,the ratio of dissolved cotton,the ratio of alcohol/acetone,and the speed of solvent volatilization,there is a certain deviation between design size and actual size of printed gun propellants.The preliminary ballistic test of 12.7 mm machine gun shows that when the mixed charge of NC-120 and D-4/7 is 16 g and the charge ratio is 1∶1,the bore pressure is 314.2 MPa and the muzzle velocity is 854.1 m·s^(-1).The stable and normal combustion of the direct ink-writing printed gun propellants embedded with multi-cubic pores in the chamber is realized.However,for the sake of practical application of printed gun propellants embedded with multi-cubic pores,several parameters need to be further optimized such as shape,web size,and the web size matching between inner and outer layer.
作者
凡文蕊
熊鹏
宋育芳
肖乐勤
赵其林
李纯志
周伟良
FAN Wen-rui;XIONG Peng;SONG Yu-fang;XIAO Le-qin;ZHAO Qi-lin;LI Chun-zhi;ZHOU Wei-liang(School of Chemistry and Chemical Engineering Nanjing University of Science&Technology,Nanjing 210094,China;Luzhou North Chemical Industries Co.Ltd,Luzhou 646605,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2022年第9期903-910,共8页
Chinese Journal of Energetic Materials
关键词
直写打印
发射药
燃烧性能
弹道性能
direct ink writing
gun propellant
combustion performance
ballistic properties
