期刊
CHEMICAL ENGINEERING JOURNAL
卷 433, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134478
关键词
Boron-based Energetic Composites; Encapsulated Structure; EISA Method; Combustion Performance; Reaction Mechanism
资金
- Open Research Fund Program of Sci-ence and Technology on Aerospace Chemical Power Laboratory (China) [STACPL220181B04]
- National Natural Science of China [22005090]
The study focuses on improving the combustion performance of Boron-based metal fuel by encapsulating Boron-based metastable intermixed composites (MICs) with ammonium perchlorate (AP) through a solvent evaporation induced self-assembly (EISA) method.
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/Bii(2)O(3)/AP spherical composites showed higher combustion temperature (1435 ?) and shorter ignition delay time (379 & PLUSMN; 25 ms) than the physically mixed sample (1264 ? and 1035 & PLUSMN; 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.
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