Solidification Mechanism of the D-Gun Sprayed Fe-Al Particles

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The detonation gas spraying method is used to study solidification of the Fe-40Al particles after the D-gun spraying and settled on the water surface. The solidification is divided into two stages. First, the particle solid shell forms during the particle contact with the surrounding air / gas. Usually, the remaining liquid particle core is dispersed into many droplets of different diameter. A single Fe-Al particle is described as a body subjected to a rotation and finally to a centrifugal force leading to segregation of iron and aluminum. The mentioned liquid droplets are treated as some spheres rotated freely / chaotically inside the solid shell of the particle and also are subjected to the centrifugal force. The centrifugal force, and first of all, the impact of the particles onto the water surface promote a tendency for making punctures in the particles shell. The droplets try to desert / abandon the mother-particles through these punctures. Some experimental evidences for this phenomenon are delivered. It is concluded that the intensity of the mentioned phenomenon depends on a given droplet momentum. The droplets solidify rapidly during their settlement onto the water surface at the second stage of the process under consideration. A model for the solidification mechanism is delivered.

[1] Y.A. Kharlamov, Detonation Spraying of Protective Coatings, Materials Science and Engineering 93, 1-8 (1987).

[2] E. Kadyrov, V. Kadyrov, Gas Dynamical Parameters of Detonation Powder Spraying, Journal of Thermal Spray Technology 4 (3), 280-287 (1995).

[3] E. Kadyrov, Gas-Particle Interaction in Detonation Spraying Systems, Journal of Thermal Spray Technology 5 (2), 185-194 (1996).

[4] K. Ramadan, P. Barry Butler, Analysis of Particle Dynamics and Heat Transfer in Detonation Thermal Spraying Systems, Journal of Thermal Spray Technology 13 (2), 248-254 (2004).

[5] V. Ulianitsky, A. Shterster, S. Zlobin, I. Smurov, Computer_Controlled Detonation Spraying: from Process Fundamentals towards Advanced Applications, Journal of Thermal Spray Technology 20 (4), 791-798 (2011).

[6] W. Kurz, J.D. Fisher, Fundamentals of Solidification, ed. Trans Tech Publications Ltd., Uetikon-Zuerich, Switzerland 1998.

[7] W. Wołczyński, J. Kloch, R. Ebner, W. Krajewski, The Use of Equilibrium Phase Diagram for the Calculation of Non-Equilibrium Precipitates in Dendritic Solidification. Validation, Calphad 25, 391-400 (2002).

[8] W. Wołczyński, W. Krajewski, R. Ebner, J. Kloch, The Use of Equilibrium Phase Diagram for the Calculation of Non-Equilibrium Precipitates in Dendritic Solidification. Theory, Calphad 25, 401-408 (2002).

[9] M.J. Aziz, Model for Solute Redistribution during Rapid Solidification, Journal of Applied Physics 53, 1158-1168 (1982).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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