GAP/AP/RDX/Al复合固体推进剂的热致损伤演化  

Thermal Induced Damage Evolution of GAP/AP/RDX/Al Composite Solid Propellant

作　　者：吴海波 武毅 王一尧 金丰凯 李海涛 WU Hai-bo;WU Yi;WANG Yi-yao;JIN Feng-kai;LI Hai-tao(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Hubei Institute of Aerospace Chemical Technology,Xiangyang Hubei 441003,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]湖北航天化学技术研究所,湖北襄阳441003

出　　处：《火炸药学报》2024年第9期840-848,I0004,共10页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.U2341288)。

摘　　要：为研究GAP/AP/RDX/Al复合固体推进剂在加热条件下的热致损伤演化规律,制备了两种RDX/AP含量不同的GAP基推进剂,通过TG-DSC-IR联用技术表征了试样的热分解性能;利用加热装置对样品进行热处理,通过显微CT成像及扫描图像三维重构技术,获得了不同加热温度(50~130℃)、加热时长(5~35 min)、加热面积(25%、50%、87.5%表面积)条件下的两种推进剂试样的CT断面图像、三维孔隙分布图、孔隙率、孔隙尺寸分布等微观结构信息。结果表明,GAP推进剂的初始试样中的孔隙主要是AP、RDX等固体颗粒内部的初始孔隙,热损伤孔隙主要为固体颗粒与黏合剂基体的界面脱湿孔隙、基体分解后产生的孔隙、初始结构缺陷;GAP推进剂在130℃下热损伤后孔隙规模相较于初始样品有显著增长,且RDX含量越高,试样受热刺激后损伤程度越大。In order to study the heat-induced damage evolution of GAP/AP/RDX/Al composite solid propellants under heating conditions,two GAP-based propellants with different RDX/AP contents were prepared,and the thermal decomposition properties of the samples were characterized by TG-DSC-IR technology.The samples were heated with a heating device,and the CT profile image,3D pore distribution map,porosity and pore size distribution of the two propellant samples were obtained under different heating temperatures(50-130℃),heating times(5-35 min)and heating areas(25%,50%and 87.5%surface area)through micro-CT imaging and three-dimensional reconstruction of scanning images.The results show that the pores in the initial sample of GAP propellant are mainly the initial pores inside solid particles such as AP and RDX,and the thermal damage pores are mainly the interface dewedding pores between solid particles and the adhesive matrix,the pores generated after the matrix decomposition,and the initial structural defects.The pore damage size of GAP propellant after heating at 130℃increases significantly compared with the initial sample,and the higher the RDX content,the greater the damage degree of the sample after thermal stimulation.

关 键 词：物理化学 固体推进剂 热分解 热损伤 显微CT成像 孔隙 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]