Modeling of Dynamics and Thermal History of Fe40Al Intermetallic Powder Particles Under Gas Detonation Spraying Using Propane–Air Mixture

The dynamic properties and thermal history of Fe40Al at.% intermetallic particles have been estimated. The parameters of the gas detonation process for the investigated mixture have been calculated using thermochemical code, and the motion parameters as well as thermal history of the analyzed powder particles have been assessed using computational fluid dynamics software and self-developed algorithms. The appropriate models allowed for determination of the melted volume (mass) fraction of a certain analyzed single particle, which is dependent on a particle diameter ranging from 10 to 160 μm. The results show that only particles with a diameter lower than 80 μm melt under the investigated conditions. Moreover, the estimated radial distribution of the temperature inside the particle is almost homogenous due to relatively high FeAl thermal conductivity and relatively low thermal conductance of the surface heat transfer. The calculated final velocity of particles has been referred to some experimental and literature data from previous studies by other researchers, and the results were found to be in agreement.