Alloying reaction of Ti/B high-energy self-assembled microspheres to improve combustion performance

The alloying reaction between highly reactive metals can release substantial energy, highlighting its potential in energetic materials. This study presents the preparation of Ti/B high-energy self-assembled microspheres using microdroplet technology, with nitrocellulose and fluorine rubber as composite binders. The properties of these high-energy microspheres were examined under three conditions: titanium excess, stoichiometric balance, and boron excess. The results demonstrate that the microspheres possess a narrow particle size distribution, high circularity, excellent flowability, and improved safety. Ignition tests revealed that the microspheres achieve stable self-sustained combustion through the alloying reaction of the raw materials, producing a high-temperature flame of approximately 1650 °C. Additionally, increasing boron content was found to enhance flame area, raise output temperature, and accelerate burning rate. These findings offer significant insights for the design of high-energy microsphere formulations.