Spark Plasma Sintering of MgO-Strengthened Aluminum

M. Ben-Haroush; G. Dikovsky; S. Kalabukhov; M. Aizenshtein; S. Hayun

doi:10.1007/s11665-015-1866-6

Spark Plasma Sintering of MgO-Strengthened Aluminum

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

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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.

Original language	English
Pages (from-to)	648-655
Number of pages	8
Journal	Journal of Materials Engineering and Performance
Volume	25
Issue number	2
DOIs	https://doi.org/10.1007/s11665-015-1866-6
State	Published - 1 Feb 2016

Keywords

aluminum
powder metallurgy
sintering

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1007/s11665-015-1866-6

Cite this

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title = "Spark Plasma Sintering of MgO-Strengthened Aluminum",

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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AU - Ben-Haroush, M.

AU - Dikovsky, G.

AU - Kalabukhov, S.

AU - Aizenshtein, M.

AU - Hayun, S.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - 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.

AB - 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.

KW - aluminum

KW - powder metallurgy

KW - sintering

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Spark Plasma Sintering of MgO-Strengthened Aluminum

Abstract

Keywords

ASJC Scopus subject areas

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