Contrast Variation Small Angle Neutron Scattering Investigation of Micro- and Nano-Sized TATB
AbstractSmall angle neutron scattering (SANS) with contrast variation was used to characterize the fractal behavior and embedded porosity of micro/nano-sized 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) crystallites, gauging the effects of particle sizes on the microstructural features. Scattering results reveal that the external surface of micro-sized TATB crystallites are continuous and smooth interfaces and their internal pores display a surface fractal structure (surface fractal dimension 2.15 < DS < 2.25), while the external surface of nano-sized TATB particles exhibit a surface fractal structure (surface fractal dimension 2.36 < DS < 2.55) and their internal pores show a two-level volume fractal structure (large voids consist of small voids). The voids volume fraction of nano-sized TATB particles are found increased distinctively when compared with micro-sized TATB particles on length scale between 1 nm and 100 nm. Specific surface areas are also estimated based on Porod law method, which are coincident with Brunauer-Emmett-Teller (BET) measurements. The contrast variation technique distinguishes the information of internal voids from external surface, suggesting SANS is a powerful tool for determining the microstructural features, which can be used to establish the relationship between microstructures and properties of micro/nano-energetic materials. View Full-Text
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Song, P.; Tu, X.; Bai, L.; Sun, G.; Tian, Q.; Gong, J.; Zeng, G.; Chen, L.; Qiu, L. Contrast Variation Small Angle Neutron Scattering Investigation of Micro- and Nano-Sized TATB. Materials 2019, 12, 2606.
Song P, Tu X, Bai L, Sun G, Tian Q, Gong J, Zeng G, Chen L, Qiu L. Contrast Variation Small Angle Neutron Scattering Investigation of Micro- and Nano-Sized TATB. Materials. 2019; 12(16):2606.Chicago/Turabian Style
Song, Panqi; Tu, Xiaoqing; Bai, Liangfei; Sun, Guangai; Tian, Qiang; Gong, Jian; Zeng, Guiyu; Chen, Liang; Qiu, Lili. 2019. "Contrast Variation Small Angle Neutron Scattering Investigation of Micro- and Nano-Sized TATB." Materials 12, no. 16: 2606.
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