含能材料2026，Vol.34Issue(1)：82-91,10.DOI:10.11943/CJEM2025194
基于相变材料包覆的高渐增性发射药制备及性能
Preparation and Properties of High Progressive Propellant based on Coating of Phase Change Material
摘要
Abstract
In response to the higher demands for progressive combustion and reduced erosion in small and medium-caliber rapid-fire weapons,a coating system based on stearic acid/silica/polyurethane(SA/SiO2/PU)phase change material was de-signed,and the oblate-gun propellants were prepared by combining with fluidized bed technology.The compatibility,thermal decomposition,microstructure,combustion performance and storage stability of the propellants were investigated using differen-tial scanning calorimetry,Raman spectroscopy,scanning electron microscopy,and a closed bomb.Results indicate that the SA/SiO2/PU coating system exhibits Grade 1 compatibility with the propellant.The enthalpy of melting(ΔHm)and crystallization(ΔHc)of the coating system are 39.02 J·g-1 and 39.46 J·g-1,respectively,indicating a reversible phase transition process and good chemical stability.Microstructural analysis reveals that the propellant surface is densely and uniformly coated,with a coat-ing thickness of approximately 13 μm under the coating time of 20 min.Compared with the uncoated propellant,the initial dy-namic vivacity(L0)and maximum dynamic vivacity(Lm)of the coated propellants decrease by respectively 48.0%and 44.7%,while the dynamic vivacity difference(ΔL)increases to 0.22 MPa-1·s-1,demonstrating high progressive combustion characteris-tics.In terms of storage stability,the average gas evolution of the coated propellant is 1.04 mL·g-1,and the methyl violet test shows a 6.25%extension in discoloration time,suggesting that the coating process contributes to an improved storage stability of the oblate-gun propellant.关键词
发射药/包覆/SA/SiO2/PU相变材料/热分解性能/燃烧性能Key words
propellant/coating/SA/SiO2/PU phase change materials/thermal decomposition/combustion performance分类
军事科技引用本文复制引用
姜梦鹤,杨奇,丁亚军,肖忠良..基于相变材料包覆的高渐增性发射药制备及性能[J].含能材料,2026,34(1):82-91,10.基金项目
国家自然科学基金(22475101)National Natural Science Foundation of China(No.22475101) （22475101）
