The Preparation Of Aluminium Magnesium Alloy Metal Fuel And Its Thermal Properties

Hydro-reactive metal fuel as a new type of fuel, with its high energy density, long working time for good performance has been widely used in underwater weapon. On the basis of study magnesium based, aluminum metal and to solve the propellant ignition and combustion difficult problems, the aluminum magnesium alloy metal fuel preparation, thermal properties have been studied.First of all, using planetary ball mill and through the ball material ratio, control grinding time to prepare the different magnesium aluminum alloy powders. And then using XRD, SEM and so on characterization and analysis, the results showed that under the action of high speed impact, magnesium powder and Al powder happened deformation, grain size decrease gradually. Finally, magnesium as the main diffusion group inserting into aluminum crystals formed in the alloy.Secondly, use the composite propellant of casting process to prepare propellant.Finding that curing samples appear hole. Based on the structure analysis of the porosity formation, the results show that:AP hygroscopicity of cause air is the root cause of hole. When taking the cladding process, the effect is good.Finally, the TG and DSC thermal analysis methods were used for alloy magnesium hydro-reactive metal fuel. Its main components of the thermal decomposition characteristics of the system were also examined. The results showed that:with magnesium aluminum alloy powders mass ratio increases, the oxidation peak temperature become more and more lower. Fuel with the increase of the content of alloy powders on the initial oxidation, the peak temperature also have certain reduced, and the corresponding ignition temperature also reduced. The increase of the content of AP made the fuel faster to achieve initial decomposition temperature, and heat temperature also increased. Catalyst Fe, Cu, Co for fuel are the initial peak temperature decreasing effect, Co catalyst can reduce HTPB decomposition peak temperature, Cu catalyst for aluminum magnesium alloy hydro-reactive metal fuel AP of thermal decomposition reaction has certain catalytic effect of HTPB, but the catalytic effect is not obvious.