含能材料2024，Vol.32Issue(4)：345-352,8.DOI:10.11943/CJEM2023157
炸药造型颗粒随机堆积体系物理参量无损表征
Non-destructive Characterization of Physical Parameters in Random Packing Systems of Explosive Molding Granules
摘要
Abstract
The molding granule is an intermediate for polymer-bonded explosive(PBX)components.Characterization of the physical parameters of granular system is of great significance to understanding the influence of different granule structure on the performance of PBX components.X-ray computed micro-tomography(XCT)and CT image processing were used to non-destructively characterize physical parameters(including granule diameter,volume fraction,porosity,sphericity and intrin-sic density)of the granular random packing systems.The average granule diameter of granular systems is up to 1.04 mm,the vol-ume fraction is up to 68.7%,the lowest porosity is 1.04%,the highest average sphericity is 0.93,and the highest density is 1.44 g·cm-3.Results show that the type of binder,composition and ratio of explosive crystals,and granulation process have a pronounced influence on the physical parameters of granular packing systems.Moreover,there is a correlation between physical parameters of granular systems.The more dispersed diameter distribution of granular system leads to the larger the average sur-face area of granules.The larger average granule diameter and lower average sphericity of granular system result in the higher po-rosity of the granules.The volume fraction of granular systems with larger average granule diameter is higher,and the volume fraction of the granule accumulation is independent of the sphericity when the average sphericity is large.This research provides fundamental insights into understanding the physical parameters and their associations with material properties in molding granu-lar packing systems.关键词
炸药造型颗粒/随机堆积体系/体积分数/孔隙率/X射线层析成像Key words
explosive molding granule/random packing system/volume fraction/porosity/X-ray tomography分类
军事科技引用本文复制引用
岳弘历,张催,张伟斌..炸药造型颗粒随机堆积体系物理参量无损表征[J].含能材料,2024,32(4):345-352,8.基金项目
国家自然科学基金青年基金(12105267) National Natural Science Foundation of China(No.12105267) （12105267）
