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NEPE推进剂装药界面粘接问题是制约NEPE推进剂推广应用的技术瓶颈之一,急需有效的细观结构表征技术,以揭示NEPE推进剂装药界面形成机理。采用Micro-CT技术,开展了NEPE推进剂/衬层/绝热层界面细观结构研究,发现Micro-CT图像可明显区分界面各相以及各相的基体与填充物,可识别不同的固体填充物;绝热层/衬层界面存在有锯齿状的镶嵌结构的扩散层,厚度不超过10μm;推进剂与衬层之间有一定的扩散,存在明显的推进剂与衬层基体富集层,在推进剂一侧,还形成40~80μm的HMX颗粒富集层。
NEPE propellant charge interfacial adhesion problem is one of the bottlenecks restricting the popularization and application of NEPE propellant, and an urgent need of effective meso-structure characterization technology to reveal the formation mechanism of NEPE propellant charge interface. Micro-CT technology was used to study the mesoscopic structure of NEPE propellants / lining / heat-insulating layer interface. It was found that the micro-CT images could obviously distinguish the phases of the interface and the matrix and filling of each phase, which could identify different solid fillers ; There is a serrated mosaic structure of the diffusion layer at the insulation / lining interface, the thickness of which does not exceed 10μm; there is some diffusion between the propellant and the lining, and there are obvious enrichment layers of the propellant and the lining substrate, The side of the agent also forms a 40-80 μm HMX particle-rich layer.