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Open AccessArticle

Aluminum-Alumina Composites: Part I: Obtaining and Characterization of Powders

1
KINETICA Engineering Center, National University of Science and Technology MISIS, 119991 Moscow, Russia
2
Laboratory of Energy Storage Substances, Joint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, Russia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(19), 3180; https://doi.org/10.3390/ma12193180
Received: 29 August 2019 / Revised: 25 September 2019 / Accepted: 26 September 2019 / Published: 27 September 2019
(This article belongs to the Special Issue Metallurgy of Non-Ferrous, Rare and Precious Metals)
The process of advanced aluminum-alumina powders production for selective laser melting was studied. The economically effective method of obtaining aluminum-alumina powdery composites for further selective laser melting was comprehensively studied. The aluminum powders with 10–20 wt. % alumina content were obtained by oxidation of aluminum in water. Aluminum oxidation was carried out at ≤200 °C. The oxidized powders were further dried at 120 °C and calcined at 600 °C. Four oxidation modes with different process temperatures (120–200 °C) and pressures (0.15–1.80 MPa) were investigated. Parameters of aluminum powders oxidation to obtain composites with 10.0, 14.5, 17.4, and 20.0 wt. % alumina have been determined. The alumina content, particle morphology, and particle size distribution for the obtained aluminum-alumina powdery composites were studied by XRD, SEM, laser diffraction, and volumetric methods. According to the obtained characteristics of aluminum-alumina powdery composites, they are suitable for the SLM process. View Full-Text
Keywords: aluminum; alumina; composite; powder; oxidation; selective laser melting; particle morphology aluminum; alumina; composite; powder; oxidation; selective laser melting; particle morphology
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Gromov, A.A.; Nalivaiko, A.Y.; Ambaryan, G.N.; Vlaskin, M.S.; Buryakovskaya, O.A.; Kislenko, S.A.; Zhuk, A.Z.; Shkolnikov, E.I.; Slyusarskiy, K.V.; Osipenkova, A.A.; Arnautov, A.N. Aluminum-Alumina Composites: Part I: Obtaining and Characterization of Powders. Materials 2019, 12, 3180.

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