中国工程物理研究院化工材料研究所，四川 绵阳 621999
Institute of Chemical Materials， CAEP， Mianyang 621999， China
为了量化获取造型颗粒结构统计特征参量，基于显微CT、图像处理与统计分析技术开展了造型颗粒统计特征参量表征方法研究，利用该方法对TATB基造型颗粒进行了统计特征参量表征实验，并对表征结果和方法进行了评估。结果表明该方法可实现对造型颗粒粒径、形貌、孔隙、密度、堆积特性的量化表征，TATB基造型颗粒的粒径与球形度分别近似服从指数高斯和韦伯分布，本征密度1.35 g·cm-3，可见孔隙率2.3% （@空间分辨率14.3 μm），体积分数0.69。评估实验表明该方法具有较好准确性、稳定性和重复性，粒径表征结果与筛分法结果相符，主要统计特征参量在不同时间段的测量结果相对偏差小于1%，形貌和孔隙特性表征结果受样品堆积状态影响相对较大。
Molding granule is the bridge between Explosive crystal materials and PBX. Quantitative characterization of their physical structure is the key to achieving the performance regulation and improvement of PBX. Based on micro-CT， image processing， and statistical analysis is researched to quantitatively obtain the characteristic parameters of molding granules. Image processing and statistical analysis were researched to quantitatively obtain the characteristic parameters of molding granules based on micro-CT. The characteristic parameters of TATB-based molding granules were characterized by this method， and an evaluation of the characterization method was carried out. The results suggest that this method can implement the quantitative characterization of the size， morphology， porosity， density， and packing characteristics of the molding granules. The granule size and sphericity of the TATB-based molding granules approximately obey the exponential Gaussian and Weibull distributions， respectively， and the intrinsic density is 1.35 g·cm-3， visible porosity of 2.3% （@ spatial resolution 14.3 μm）， volume fraction of 0.69. Evaluation experiments show that the method has good accuracy， stability， and repeatability， the characterization results of granule size are consistent with the results of the sieving process， and the relative deviation of the characterization results of main characteristic parameters in different periods are less than 1%. The results of morphology and properties are relatively greatly affected by the packing state of granules and the spatial resolution of micro-CT.
张催,张才鑫,杨亚飞,等. 造型颗粒体系统计特征参量CT量化表征方法[J]. 含能材料,DOI:10.11943/CJEM2023142.复制