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Title: Spark Plasma Extrusion and the Thermal Barrier Concept
Authors: Čelko, Ladislav 
Menelaou, Melita 
Casas Luna, Mariano 
Horynová, Miroslava 
Musálek, Tomáš 
Remešová, Michaela 
Díaz-De-La-Torre, Sebastián 
Morsi, Khaled B. 
Major Field of Science: Engineering and Technology
Field Category: Chemical Engineering
Keywords: Carbon nanotubes;Aluminum;Extrusion;Spark plasma extrusions
Issue Date: 15-Apr-2019
Source: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 50, no. 2, pp. 656-665, 15 April 2019
Volume: 50
Issue: 2
Start page: 656
End page: 665
Journal: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science 
Abstract: 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. © 2019, The Minerals, Metals & Materials Society and ASM International.
Description: 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.
ISSN: 1073-5615
DOI: 10.1007/s11663-018-1493-3
Rights: © 2019, The Minerals, Metals & Materials Society and ASM International
Type: Article
Affiliation : Brno University of Technology 
Ekotoxa Opava 
Centro de Investigación e Innovación Tecnológica 
San Diego State University 
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