Integrated preparation of Al-based energetic micro-unit fuel toward combustion performance

• Published in: Hang kong cai liao xue bao Vol. 43; no. 4; pp. 102 - 110
• Main Authors: Liu, Qingdong, Wu, Zhujun, Li, Miaomiao, Xu, Yifeng, Xin, Xipeng, Xu, Jijin, Song, Xuefeng
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.08.2023; Journal of Aeronautical Materials
• Subjects: al powder; Aluminum; Bomb calorimetry; combustion performance; Combustion products; Core-shell structure; Decomposition; energetic microunit; Fuels; High temperature; Inductively coupled plasma; Low temperature; Oxidizing agents; Particle size; Propellant combustion; Solid propellants
• ISSN: 1005-5053
• DOI: 10.11868/j.issn.1005-5053.2022.000105

An Al-based energetic micro-unit Al@PFPE@AP fuel powder with the oxidant AP coated on the surface of fluoridemodified Al powder was designed and prepared by the component composite technique to address the two major problems of incomplete combustion and component polarization of Al powder in solid propellants. The morphology, particle size, combustion properties and combustion products of the micro-unit powder were analyzed by scanning electron microscopy, laser particle size measurement, oxygen bomb calorimetry, inductively coupled plasma emission spectrometry and X-ray diffraction. The results show that the energetic microunits Al@PFPE@AP present a more obvious core-shell structure with uniform particle size, and when the addition amount of PFPE is 5%, the combustion heat value of Al@5%PFPE@AP is increased by 63.86%, the particle size of combustion products is decreased by 61.83%, and the active aluminum content of combustion products is decreased by more than57% compared with the mechanically mixed AP+Al s