含能材料2024，Vol.32Issue(8)：795-803,9.DOI:10.11943/CJEM2024180
包覆微孔球扁药的结构与性能
Structure and Properties of Coated Microporous Oblate Spherical Propellant
周港澳 1陶忠安 2范文豪 1丁亚军1
作者信息
- 1. 南京理工大学 化学与化工学院,江苏 南京 210094||南京理工大学特种能源材料教育部重点实验室,江苏 南京 210094
- 2. 黑龙江北方工具有限公司,黑龙江牡丹江 157000
- 折叠
摘要
Abstract
Oblate spherical propellant is the main charges for small and medium caliber and light weapons,and the method of controlling its progressive properties has consistently been a hot research topic.The ethyl cellulose(EC)-coated microporous gun propellant was developed by combining internal microporous combustion enhancement using SC-CO2 and the surface coating flame retardant via fluidized bed coating,resulting in precise and controllable energy release.Scanning electron microscopy and infrared spectroscopy were applied to investigate the microstructure and composition,and the closed bomb device was used to analyze the combustion and storage performance.The results showed that the coated microporous gun propellant exhibited sur-face structural integrity and density.The mass fraction of the coating layer increased from 2.32％to 9.79％when the coating time was increased from 5 min to 30 min,and the corresponding film thickness increased from 7 μm to 33 μm.Compared with the original gun propellant,the initial and maximum activities Lo and Lm of the microporous gun propellant with 10 min coating time were reduced by 62.34％and 55.61％,respectively,with an AL-B characteristic value of 1.304 MPa-1·s-1.Accelerated aging tests showed minimal changes in the combustion performance of the coated spherical propellant.The p-t and L-B curves of the aged samples were consistent with those of the untreated samples after aging at 75 ℃ for 14 days.This indicated that the EC-coated mi-croporous gun propellant exhibits excellent storage stability.关键词
球扁药/表面包覆/核-壳结构/燃烧渐增性/贮存稳定性Key words
propellant/coating/core-shell structure/high progressive property/storage stability分类
军事科技引用本文复制引用
周港澳,陶忠安,范文豪,丁亚军..包覆微孔球扁药的结构与性能[J].含能材料,2024,32(8):795-803,9.
