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Volume 5, Issue 5 Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212 Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11th International Conference on
Mechanism of spark plasma sintering of high temperature ceramics such as carbides (ZrC, B4C)
Alexandre Maitre, Nicolas Pradeilles and Guy Antou
University of Limoges, France
Spark Plasma Sintering (SPS) has proved is efficiency on the sintering on various materials which were known to be difficult to sinter
without additives. In this presentation, the investigation of some thermomechanical properties will be illustrated on two different
carbides Zirconium carbide and boron carbide. ZirconiumCarbide is interesting for high temperature application. Zirconium carbide
(ZrCx) and oxycarbide (ZrCx Oy) carbide was synthetized by carboreduction of zirconia and carbon and was then sintered by SPS. A
complete study including composition, particles size evolution was done. The kinetics of spark plasma sintered ceramics has been
investigated. A change of densification mechanism appears during the intermediate and final sintering stages. During this last stage,
the deformation mechanism is similar to the one involved during creep of dense ceramics. The comparison of densification and creep
strain rates seems to show that no specific effects strongly enhance strain rate during the final densification stage of Spark Plasma
Sintering. Boron carbide is a promising material for moderator in nuclear industry. The influence of preparation before SPS was
studied: a liquid way was studied and compared. Different solvent were tested and green bodies were obtained. During this sintering,
different chemical reactions were observed: oxides present in the native powder react and the composition of the carbide evolves. In
a second step, thermomechanical properties were determined.
Biography
Alexandre Maître is professor at the Science of Ceramic Processes and Surface Treatments laboratory at Limoges in France. His thesis diploma (1995-1998) was
devoted to the kinetic and thermodynamic aspects of the synthesis of transition metal carbides by carbothermal reduction. In october 2000, he obtained a permanent
position as CNRS researcher at the Laboratory of Chemistry of Inorganic Solid at Nancy to develop investigations concerning the thermodynamic modelling, the
electrochemical behaviour in corrosive environment, the metallurgical aspects of lead-based alloys. In September 2004, he became assistant professor in SPCTS
to implement research activities about the elaboration by Polymer Derived Ceramics (PDCs) route and the mechanisms of sintering of high temperature ceramics.
His scientific production (h index: 16) is now composed of 92 publications in international journals, 22 invited conferences, 65 oral communications, 3 chapters of
books, 3 grants, etc. He was responsible for at least 15 national or international projects.
Alexandre Maitre et al., Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-005