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Synthesis of FeAl Hetero-Nanostructured Bulk Parts via Spark Plasma Sintering of Milled Powder

Published online by Cambridge University Press:  26 February 2011

Thierry Grosdidier
Affiliation:
thierry.grosdidier@univ-metz.fr, Laboratoire d'Etude des Textures et Application aux Matériaux (LETAM), UMR CNRS 7078, Université de Metz, Ile du Saulcy, Metz, 57045, France
Gang Ji
Affiliation:
ji.gang@univ-metz.fr, Laboratoire d'Etude des Textures et Application aux Matériaux (LETAM), UMR CNRS 7078, Université de Metz, Ile du Saulcy, Metz, 57045, France
Frédéric Bernard
Affiliation:
fbernard@u-bourgogne.fr, Laboratoire de Recherche sur la Réactivité des Solides (LRRS), UMR CNRS 5613, Université de Bourgogne, 9 avenue Alain Savary, Dijon, 21078, France
Sébastien Launois
Affiliation:
sebastien.launois@cea.fr, Département des Technologies des Nanomatériaux, Commissariat à l'Energie Atomique, 17 rue des Martyrs, Grenoble, 38054, France
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Abstract

Spark plasma sintering (SPS) has been used in order to introduce nanocrystalline grains within fully dense FeAl consolidated parts. Hetero-nanostructured parts, consisting of nano, ultrafine and micrometric grains, have been successfully processed when milled - Y2O3 reinforced - FeAl powder was used. The large temperature differences that are spontaneously generated during the SPS process as well as the use of milled powder account for the formation of such interesting structures. The grain size distribution - that is suggested to be very potent to improve both strength and ductility - could be significantly modified by a proper selection of sintering temperature and holding time.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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