Self-Propagating High-Temperature Synthesis of Ti3SiC2: Study of the Reaction Mechanisms by Time-Resolved X-Ray Diffraction and Infrared Thermography

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Abstract:

Ti3SiC2 is synthesized by self-propagating high-temperature synthesis (SHS) of elemental titanium, silicon, and graphite powders. The reaction paths and structure evolution are studied in situ during the SHS of the 3Ti+Si+2C mixture by time-resolved X-ray diffraction coupled with infrared thermography. The proposed reaction mechanism suggests that Ti3SiC2 might be formed from Ti–Si liquid phase and solid TiCx. Finally, the effect of the powders starting composition on the Ti3SiC2 synthesis is studied. For the investigated initial mixtures, TiCx is always formed as a major impurity together with the Ti3SiC2 phase.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2006.01120.x

Affiliations: 1: Laboratoire de Métallurgie Physique (UMR 6630 CNRS), BP 30179, 86962 Futuroscope-Chasseneuil du Poitou, France 2: Laboratoire d'Ingénierie des Matériaux et des Hautes Pressions (UPR 1311 CNRS), Institut Galilée, 93430 Villetaneuse, France

Publication date: September 1, 2006

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