Centre Inter-universitaire de Recherche et d’Ingénierie des Matériaux - UMR CNRS 5085




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PhyPol / P of polymers

The Polymer Physics (PhyPol) team is focused on the macromolecular dynamic of polymers in the solid state. A peculiar attention has been devoted to the metastability and dynamic heterogeneity of (...)

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Flash sintering of oxide nano-particles: A percolation phenomenon via particle surface softening

Le Dr. R. CHAIM donnera une conférence le 25 avril 2017 à 10h au CIRIMAT (salle 1&2 du bâtiment UPS-CIRIMAT).

Flash sintering of oxide nano-particles: A percolation phenomenon via particle surface softening

Rachman Chaim
Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa Israel

Rapid densification of ceramic nano-particle compacts by spark plasma sintering (SPS) and flash sintering (FS) are assisted by the electric fields. The high densification rates observed during SPS explained by the formation of local spark and plasma, materials jets, liquid assisted particle rearrangement, as well as local plastic deformation. However, many aspects of the densification mechanisms during FS are still unclear and subject to scholarly debate.
The basics of SPS and FS will be presented. The universal rapid densification of nano-particle compacts subjected to flash sintering will be described using the invasive percolation model. The electrical system is composed of two types of resistances of the particles and their contact points. The particle contact points first melt due to preferred Joule heating followed by thermal runaway. Further local melting has a hierarchical nature. The flash event represents the percolation threshold by invasive nature of the melt at the particle surfaces between the two electrodes. The rapid densification is associated with local particle rearrangements due to attractive capillary forces induced by the liquid film at the particle surfaces. The local melting is in agreement with the energy balance made at the flash event.

Le label "ESOF 2018" est accordé à la Conférence "Anodize it ! 2017"

Le Comité de labellisation, en séance du 29 mars 2017, a décidé d’accorder le label "ESOF 2018 - Toulouse, Cité européenne de la Science" à la conférence "Anodize it ! 2017" organisée en juillet 2017 à Toulouse.

Contact : Laurent Arurault

Best Poster Award au 2nd International Symposium on Energy Chemistry and Materials

Zifen Li a obtenu le "Best Poster Award" au 2nd International Symposium on Energy Chemistry and Materials (ISECM 2016, Hefei, Chine 27-30 octobre 2016), pour son travail intitulé "Capacitive behavior of TI3C2Tx MXene in ionic liquid electrolyte"

Institut Carnot CHIMIE BALARD CIRIMAT

M. Thierry MANDON, Secrétaire d’État chargé de l’Enseignement supérieur et de la Recherche, a annoncé le 6 juillet 2016 les résultats de l’appel à candidatures Carnot 3 : CHIMIE BALARD CIRIMAT (http://www.carnot-chimie-balard-cirimat.fr/) est officiellement labellisé institut Carnot !

Le rapprochement de l’Institut Carnot CHIMIE BALARD (Montpellier) et de l’Institut Carnot CIRIMAT (Toulouse), ancrés dans un milieu académique de premier plan, est une excellente opportunité, thématique et régionale, pour porter encore plus loin le transfert de technologie et l’innovation dans le domaine de la chimie des matériaux et procédés en développant la recherche partenariale. Ce label est la reconnaissance de tous les efforts accomplis et des progrès capitalisés depuis 2006, avec Carnot 1 puis Carnot 2.

Contact : Philippe Tailhades