Burn rate modifiers for solid propellants are being developed based on reactive materials prepared by Arrested Reactive Milling. The materials include nanocomposite thermite compositions using aluminum as a fuel and oxides of iron, molybdenum and copper as oxidizers. The materials are characterized using a set of laboratory tests. Conditions for preparation of viable propellant additives are selected based on the reduced ignition temperature and accelerated burn rate achieved for the ...