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Journal of Materials Science
Published in: Journal of Materials Science 10/2012

01-05-2012

Spark plasma sintering of a p-type Si1−x Ge x alloy: identification of the densification mechanism by isothermal and anisothermal methods

Authors: Guillaume Bernard-Granger, Amandine Néri, Christelle Navone, Mathieu Soulier, Julia Simon, Maya Marinova-Atanassova

Published in: Journal of Materials Science | Issue 10/2012

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Abstract

Spark plasma sintering of a p-type Si0.795Ge0.200B0.005 alloy has been investigated in vacuum, in the 400–1200 °C temperature range. The densification mechanism has been determined using isothermal and anisothermal methods. In spite of a slight material degradation for the highest sintering temperatures (occurrence of cristobalite nodules homogeneously dispersed in intergranular and intragranular positions), it is proposed that densification proceeds by grain boundary sliding accommodated most probably by silicon volume diffusion. The microstructure observation of several sintered samples using transmission electron microscopy supports the densification mechanism advanced. Because the elemental grains remain mostly equiaxe whatever the sintering conditions, a grain intercalation mechanism may be also implicated during densification.
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Metadata
Title
Spark plasma sintering of a p-type Si1−x Ge x alloy: identification of the densification mechanism by isothermal and anisothermal methods
Authors
Guillaume Bernard-Granger
Amandine Néri
Christelle Navone
Mathieu Soulier
Julia Simon
Maya Marinova-Atanassova
Publication date
01-05-2012
Publisher
Springer US
Published in
Journal of Materials Science / Issue 10/2012
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-012-6282-9

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