Encapsulated Boron-based Energetic Spherical Composites with Improved Reaction Efficiency and Combustion Performance
Encapsulated Boron-based Energetic Spherical Composites with Improved Reaction Efficiency and Combustion Performance
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DOI：
10.1016/j.cej.2021.134478
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发表时间：
2022-01
影响因子：
15.1
通讯作者：
Yinghui Hu;Xuwen Wang;Jian Zhang;Zhaoyang Zhu;Xiao-Yu Ren;Yulin Yang;Kaifeng Lin;Aimin Pang;Yong Shuai
中科院分区：
文献类型：
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作者：
Yinghui Hu;Xuwen Wang;Jian Zhang;Zhaoyang Zhu;Xiao-Yu Ren;Yulin Yang;Kaifeng Lin;Aimin Pang;Yong Shuai
硼（B）粉末作为金属燃料在固体推进剂中的应用受到严重的限制。为了解决这一问题，本文采用溶剂蒸发诱导自组装（EISA）方法，将高氯酸铵（AP）包覆到B基亚稳混合复合材料（MIC）中，制备了一系列B基球形复合材料。采用了自行开发的燃烧系统，包括点火池、指示灯和高速摄像机，以精确监测点火延迟和燃烧时间。与物理混合样品（1264 °C和1035 ± 63 ms）相比，由EISA制备的B/Bi 2 O3/AP球形复合材料具有更高的燃烧温度（1435 °C）和更短的点火延迟时间（379 ± 25 ms）。球形B/Bi 2 O3/AP复合材料的反应单元相互隔离，加速了热量的传递和积累，减少了烧结和团聚，从而提高了B粉的燃烧效率。本研究提出了一个有前途的策略，通过掺杂和封装过程，以提高B基金属燃料的燃烧性能。
The low energy release efficiency seriously hinders the application of Boron (B) powder as metal fuel in solid propellants. To overcome this issue, a series of B-based spherical composites were produced by encapsulating B-based metastable intermixed composites (MICs) with ammonium perchlorate (AP) by a solvent evaporation-induced self-assembly (EISA) method in this work. A self-developed combustion system containing an ignition pool, indicator light, and high-speed camera to precisely monitor ignition delay and burning times was utilized. The EISA-prepared B/Bi2O3/AP spherical composites showed higher combustion temperature (1435 °C) and shorter ignition delay time (379 ± 25 ms) than the physically mixed sample (1264 °C and 1035 ± 63 ms). The isolated reaction units of spherical B/Bi2O3/AP composite accelerated heat transfer and accumulation and reduced sintering and agglomeration, thus promoting the combustion efficiency of B powder. This study presents a promising strategy by doping and encapsulating process to increase the combustion performance of B-based metal fuel.