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Spark and plasma in spark plasma sintering of rigid ceramic nanoparticles: A model system of YAG

Marder, Rachel and Estournès, Claude and Chevallier, Geoffroy and Chaim, Rachman Spark and plasma in spark plasma sintering of rigid ceramic nanoparticles: A model system of YAG. (2014) Journal of the European Ceramic Society, 35 (1). 211-218. ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2014.08.001

Abstract

2014AbstractYttrium aluminum garnet (YAG) nano-particles were spark plasma sintered between 1100◦C and 1400◦C under 2–100 MPa pressure withoutisothermal treatments. The span of relative density between 48% and 99% enabled microstructural examination at different stages of the densification.Electron microscopy examination showed material jets with amorphous character connecting between the spherical nano-particles, which wererelated to surface melting. Aligned nano-particles within the nano-clusters, apparently affected by high local electric fields, were observed inthe partially dense microstructure. Rapid densification from 1200◦C was related to densification by nano-particle sliding and rotation assistedby surface softening. The observed microstructural features were discussed with respect to sparking and plasma formation during the SPS. Theoccurrence of plasma was explained by means of the plasma formation- plastic deformation diagram.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of the European Ceramic Society website : http://www.sciencedirect.com/science/journal/09552219
HAL Id:hal-01451094
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Technion – Israel Institute of Technology (ISRAEL)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:31 Jan 2017 14:24

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