Spark Plasma Sintering of MgO-Strengthened Aluminum

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

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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 languageEnglish
Pages (from-to)648-655
Number of pages8
JournalJournal of Materials Engineering and Performance
Issue number2
StatePublished - 1 Feb 2016


  • aluminum
  • powder metallurgy
  • sintering

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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