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Article Dans Une Revue Materials Science Forum Année : 2012

On the stability of 3C-SiC single crystals at high temperatures

Résumé

The 3C-6H polytypic transition in 3C-SiC single crystals is studied by means of diffuse X-ray scattering (DXS) coupled with transmission electron microscopy (TEM). TEM reveals that the partially transformed SiC crystals contain regions of significantly transformed SiC (characterized by a high density of stacking faults) co-existing with regions of pure 3C-SiC. The simulation of the diffuse intensity allows to determine both the volume fraction of transformed material and the transformation level within these regions. It is further shown that the evolution with time and temperature of the transition implies the multiplication and glide of partial dislocations, the kinetics of which are quantified by means of DXS.

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Matériaux
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Dates et versions

hal-02193762 , version 1 (24-07-2019)

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Deborah Dompoint, Irina Galben-Sandulache, Alexandre Boulle, Didier Chaussende, Dominique Eyidi, et al.. On the stability of 3C-SiC single crystals at high temperatures. Materials Science Forum, 2012, 717-720, pp.493-496. ⟨10.4028/www.scientific.net/MSF.717-720.493⟩. ⟨hal-02193762⟩
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