Journal
SCRIPTA MATERIALIA
Volume 60, Issue 4, Pages 195-198Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.09.034
Keywords
Spark Plasma Sintering; Scanning Electron Microscopy (SEM); Alumina; Nanocomposite
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Al1.86Fe0.14O3 powders were partially or totally reduced in H,. The fully reduced Fe-Al2O3 nanocomposite powder was sintered by spark plasma sintering (SPS) without any reaction taking place. For the other powders, the SPS induced the formation of FeAl2O4 and sometimes Fe. The most severe reducing conditions were found at the surface of the materials, producing nanocomposites with a surface layer composition and microstructure different to those of the core. This ill situ formed composite layer confers a higher hardness and fracture strength. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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