Deposition Behavior of Semi-Molten Spray Particles During Flame Spraying of Porous Metal Alloy
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Porous 316L stainless steel deposits were fabricated by flame spraying semi-molten particles with different melting degrees and spray angles to understand the deposition behavior of semi-molten spray particles. The effects of spray angle relative on the deposition efficiency and deposit porosity were investigated. The morphology of individual splats deposited on flat surface at different angles was examined. The results show that the spray angle had a significant influence on the deposit porosity, pore structure, and deposition efficiency. The slipping of solid core in semi-molten spray particle was clearly observed when semi-molten particles impacted on the polished substrate with an inclined angle. A random model was proposed to simulate the process of particle deposition. It was found that after considering the effects of both solid particle slipping upon impact and particle melting degree, the porosity calculated by simulation with the model agreed well with the experimental observation.
Keywordsporosity random model semi-molten particles slipping spray angle porous materials
The present project is financially supported by the Fund for the Doctoral Program of Higher Education of China (Grant No. 20120201130002).
- 1.H. Yu, Z.X. Lin, and Y.H. Zhou, Simulation of Liquid Aluminum Infiltration in Fabrication of Porous Aluminum, Acta Aeronaut Astronaut Sin, 2000, 21(5), p 477-480 (in Chinese)Google Scholar
- 7.O. Volciuc, E. Monaico, M. Enachi, V.V. Ursaki, D. Pavlidis, V. Popa, and I.M. Tiginyanu, Morphology, Luminescence, and Electrical Resistance Response to H2 and CO Gas Exposure of Porous InP Membranes Prepared by Electrochemistry in a Neutral Electrolyte, Appl. Surf. Sci., 2010, 257, p 827-831CrossRefGoogle Scholar
- 19.D.B. Fowler, W. Riggs, and J.C. Russ, Inspecting Thermal Sprayed Coatings, Adv. Mater. Process., 1990, 11, p 41-52Google Scholar
- 20.K. Mailhot, F. Gitzhofer, and M.I. Boulos, Absolute Coating Porosity Measurement using Image Analysis, Proceedings of the 15th ITSC, Nice, France, Vol 1, 1998, p 917-922Google Scholar