Analysis of FeAl particles thermal state in gas detonation spraying

The main scientific objective of the presentation is the model analysis (analytic as well numeric) and experimental verification of heat absorption by FeAl intermetallic phase powder particles, in a flux of gaseous products of detonation combustion that actually occurs in the technological process of gas-detonation spraying (GDS) of FeAl coatings. The Fe-Al phase equilibrium system shows that the high-temperature FeAl phase solution (the composition of which is highly similar to stochiometric) is resistant to the temperature of 1310oC. This fact is highly important from the technological point of view and remains in the focus of the process engineers. The fundamental problem when it comes to GDS process is to determine such spraying parameters so as to ensure that the particles of powder feedstock would retain the solid state while reaching the temperature ensuring their very strong softening.