Rapid construction and energy release efficiency of high energy boron based nanoflower-like composites

To address the ignition and combustion issues associated with boron (B), B@Mg@AP high-energy boron-based nanoflower composites were synthesized through etching and crystallization, utilizing magnesium boride as the raw material. The B@Mg@AP high-energy composite is coated with a nano-flower-like ammonium perchlorate (AP), with boron (B) and magnesium (Mg) arranged alternately in the core. The inclusion of magnesium (Mg) and ammonium perchlorate (AP) enhances the reactivity and combustion efficiency of boron (B). The ignition combustion tests indicate that, compared to the B/AP system, the heat release of the B@Mg@AP sample at the same ratio has increased by 452.1%, with the maximum flame temperature rising by approximately 37.4%. In comparison to boron (B), the maximum calorific value of the B@Mg@AP composite has risen by 99.3%, while the combustion efficiency has improved by 31.12%. The successful synthesis of B@Mg@AP composites is expected to facilitate the application and advancement of boron-based rocket ramjet engines.