Authors:
Sasha Cegarra (1), Jordi Pijuan (1), María Dolores Riera (2)
1- Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Plaça de la Ciència 2, 08243, Manresa, Spain
2- Department of Mining, Industrial and ICT Engineering, Technical University of Catalonia-(UPC), Av. De les Bases de Manresa, 61-73, 08242, Manresa, Spain.
Abstract:
Centrifugal atomization technique to produce metal powder offers many advantages in terms of spherical morphology of the powders, high production yield and narrow particle size distribution. Centrifugal atomization is also considered a rapid solidification technique. The final microstructure of the atomized particles is closely linked with the thermal history and cooling rates experienced during the atomization process. In this work, Al-4%Cu alloy was atomized via centrifugal atomization under different atomization conditions. Gas composition and melt superheat temperature were investigated as processing parameters that influence in the cooling history of the atomized droplets. Cooling rate was experimentally evaluated by means of the Secondary Dendrite Arm Spacing (SDAS) technique using four measurement methods found in the literature, and a numerical model was implemented to study the heat transfer between the droplets and the surrounding gas once the particles have been expelled from the disk, to identify the correlation between theoretical and experimental results.
DOI:
https://doi.org/10.59499/EP235765262