Spark Plasma Extrusion and the Thermal Barrier Concept

  • L. ČelkoEmail author
  • M. Menelaou
  • M. Casas-Luna
  • M. Horynová
  • T. Musálek
  • M. Remešová
  • S. Díaz-de-la-Torre
  • K. Morsi
  • J. Kaiser


Spark plasma sintering (SPS) is currently a major powder consolidation process with many advantages; however, it is still largely limited to the processing of simple shapes such as discs due to its geometric restrictions. Alternatively, spark plasma extrusion (SPE) is a recently developed process that has superiority over SPS in terms of faster consolidation, generating products of extended geometries and potential grain refinement capabilities under applied current. So far, work on SPE has resulted in large temperature gradients within the extruding material with microstructural and properties in-homogeneities. The present paper reports on a novel approach (thermal barrier concept) that allows the SPE of materials with enhanced uniformity in terms of microstructures and properties. Both aluminum and aluminum-carbon nanotube composites have been successfully processed using this new approach.



This work was financially supported by the Czech Science Foundation under the project GA 15-20991S. We also want to acknowledge access to the scanning electron microscopes provided within the frame of the projects CEITEC 2020 (LQ1601) and CEITEC Nano RI, MEYES CR, 2016-2019.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • L. Čelko
    • 1
    Email author
  • M. Menelaou
    • 1
  • M. Casas-Luna
    • 1
  • M. Horynová
    • 1
  • T. Musálek
    • 2
  • M. Remešová
    • 1
  • S. Díaz-de-la-Torre
    • 3
  • K. Morsi
    • 4
  • J. Kaiser
    • 1
  1. 1.CEITEC – Central European Institute of TechnologyBrno University of TechnologyBrnoCzech Republic
  2. 2.Activair s.r.o. – Sadová 44OpavaCzech Republic
  3. 3.CIITEC – Instituto Politécnico Nacional, Centro de Investigación e Innovación TecnológicaMexicoMexico
  4. 4.Department of Mechanical EngineeringSan Diego State UniversitySan DiegoUSA

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