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Erschienen in: Journal of Materials Engineering and Performance 2/2016

29.12.2015

Spark Plasma Sintering of MgO-Strengthened Aluminum

verfasst von: M. Ben-Haroush, G. Dikovsky, S. Kalabukhov, M. Aizenshtein, S. Hayun

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 2/2016

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Abstract

The effects of MgO as a sintering additive, sintering duration, and post-heat treatment on mechanical properties and microstructure of spark plasma-sintered aluminum powders were investigated. The sinterability of aluminum with or without MgO was found to be sensitive to the aluminum average particle size, meaning the amount of native oxide within the raw aluminum powders. The fracture mode changes gradually from a brittle mode (after short SPS), through a mixed brittle-ductile fracture mode (after long SPS), ending with the pure ductile form (short SPS followed by heat treatment). Maxima flexural strength and elongation were found in samples with particles size of about 44 μm and the addition of 2 wt.% MgO after short SPS process followed by an additional heat treatment. The addition of MgO may contribute to perforation of the aluminum native oxide and enhance aluminum diffusion during the heat treatment.

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Metadaten
Titel
Spark Plasma Sintering of MgO-Strengthened Aluminum
verfasst von
M. Ben-Haroush
G. Dikovsky
S. Kalabukhov
M. Aizenshtein
S. Hayun
Publikationsdatum
29.12.2015
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 2/2016
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-015-1866-6

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