REACTIVE METALLIC SYSTEMS AND METHODS FOR PRODUCING REACTIVE METALLIC SYSTEMS

摘要

The invention relates to reactive metallic systems and to methods for producing reactive metallic systems. Such systems consist of metallic particles in the form of powders or pastes, or of metallic multi-layered structures. In order to avoid the reaction product of the described self-propagating reactions being a brittle material, it is suggested in the invention that the reactive metallic system is designed as a multi-layered structure consisting of thin layers that are sequentially deposited on top of one another and that consist of ruthenium and aluminium, or as a powder consisting of ruthenium and aluminium particles. The invention solves this problem by selecting the Ru/Al system as a basic system. The strongest exothermic reaction and therefore the greatest quantity of heat released are to be expected for stoichiometrically constructed reactive systems. The heat of formation is highest here. The intermetallic phase RuAl that is produced is advantageous and this, in contrast with many comparable intermetallic phases such as NiAl, is extremely ductile at room temperature.