适应水悬浮工艺的表面疏水铝粉表征及应用

To address the chemical stability of aluminum(Al)during aqueous processing, TATB/Al/F2603 molding powders were prepared via water suspension methods, utilizing a silane bonding agent for surface modification. The microstructure and interfacial chemical state of Al powder before and after modification were characterized by using laser particle size analyzer, field emission scanning electron microscope(FE-SEM), X-ray photoelectron spectroscopy(XPS), and nanoinfrared spectrometer(Nano-IR), their application performance in TATB-based water suspension molding powder was investigated. The results show that silane bonding agent forms a bonding layer on the surface of Al powder through Si—O—Al chemical bonding, inhibiting hydrogen evolution effectively and ensuring uniform Al dispersion. Thermodynamic analysis showed that the oxidation peak temperature of modified Al powder advanced by 4-8K, with the apparent activation energy increasing from 273.302 to 405.985kJ/mol, enhancing thermal safety without compromising energy release of Al. Compared to the kneading process, the bulk density of modified Al by the water suspension method increased by 0.03g/cm³. Although the hygroscopicity(0.44%)and vacuum stability(1.1mL)slightly decreased, while they remained within operational requirements, with no significant changes in pellet density or mechanical sensitivity.