Next Article in Journal
Simulation Approach for Cathodic Protection Prediction of Aluminum Fin-Tube Heat Exchanger Using Boundary Element Method
Previous Article in Journal
On the Development of Material Constitutive Model for 45CrNiMoVA Ultra-High-Strength Steel

Preparation Method of Spherical and Monocrystalline Aluminum Powder

IMAT Institute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24, 8010 Graz, Austria
Institute of Materials Engineering, Cracow University of Technology, 24 Warszawska ave, 31-155 Cracow, Poland
Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
Institut für Elektronenmikroskopie und Nanoanalytik, Steyrergasse 17/III, 8010 Graz, Austria
Author to whom correspondence should be addressed.
Metals 2019, 9(3), 375;
Received: 5 March 2019 / Revised: 19 March 2019 / Accepted: 20 March 2019 / Published: 23 March 2019
This paper presents a new production method for a spherical and monocrystalline aluminum powder. Aluminum powder of irregular particle shapes was mixed with silica nanoparticles and heated to a temperature above the melting point of aluminum. Due to its molten state, high surface tension, and poor wettability, the aluminum particles were transformed into liquid and spherical droplets separated by silica nanoparticles. The spherical shape was then retained when the aluminum particles solidified. The influence of the processing temperature on the particle shape, phase composition, and microstructure was investigated. Moreover, calorimetric, X-ray diffraction, grain size, and scanning electron microscopy with electron backscatter diffraction (SEM-EBSD) measurements of the particles’ microstructure are presented. It is proven that, by this means, a spherical and monocrystalline aluminum powder can be efficiently created directly from an air-atomized irregular powder. The observed phenomenon of particles becoming round is of great importance, especially when considering powder preparation for powder-based additive manufacturing processes. View Full-Text
Keywords: aluminum; spherical particles; powder; crystal; EBSD aluminum; spherical particles; powder; crystal; EBSD
Show Figures

Graphical abstract

MDPI and ACS Style

Skalon, M.; Hebda, M.; Buzolin, R.; Pottlacher, G.; Mitsche, S.; Sommitsch, C. Preparation Method of Spherical and Monocrystalline Aluminum Powder. Metals 2019, 9, 375.

AMA Style

Skalon M, Hebda M, Buzolin R, Pottlacher G, Mitsche S, Sommitsch C. Preparation Method of Spherical and Monocrystalline Aluminum Powder. Metals. 2019; 9(3):375.

Chicago/Turabian Style

Skalon, Mateusz, Marek Hebda, Ricardo Buzolin, Gernot Pottlacher, Stefan Mitsche, and Christof Sommitsch. 2019. "Preparation Method of Spherical and Monocrystalline Aluminum Powder" Metals 9, no. 3: 375.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop