Researcher with the National Centre for Scientific Research (CNRS) Leader of the group Structures and Properties in Solidification Processes (SP2) e-mail: Tél. +33 (0)4 93 95 74 27 bureau : BE 115

CV (pdf)

liste des publications

Education :

• Habilitation, Institut National Polytechnique de Lorraine (INPL, 2007)
• Ph. D., Ecole Polytechnique Fédérale de Lausanne (EPFL, 1994)
• EA (Master), Institut National Polytechnique de Grenoble (INPG, 1990)
• Engineer diploma, Ecole Nationale Supérieure d’Electrochimie et d’Electrométallurgie de Grenoble (ENSEEG, 1990)

Professional experience :

• CNRS researcher, Ecole Nationale Supérieure des Mines de Paris (ENSMP, Sept. 2004)
• CNRS researcher, Ecole Nationale Supérieure des Mines de Nancy (ENSMN, 1999)
• Post-doctoral fellow, Ecole Polytechnique Fédérale de Lausanne (EPFL, 1995)

Publications

• Journals: 40
• Conferences: 45

Research themes :

• Solidification of metallic alloys
  > Study of microstructures formed in casting
  > Study of microsegregation and solidification path
  > Coupling with thermodynamic equilibrium calculations
  > Modelling of macrostructures and macrosegregation in casting
  > Modelling of homogenization and solid-state precipitation
  > Modelling of processes
• Crystallization of polymers Crystallization of polymers
  > In-situ observations and modelling

Research fields

    Phase transformations involving solidification processes are the current field of activity. Several length scales are considered, from the development of a solid-liquid interface at the microscale (micrometer) to the casting size (meter), an intermediate scale being defined by the grain structure. Specialization on the interactions existing between microsegration, due to the development of the microstructure, with macrosegration, due to mass transport at the scale of the casting, is also considered.
    Due the wide range of scale involved, modelling and numerical is largely present. Methods are being developed to couple to track a solid-liquid interface (level-sets) and mushy zone boundary (cellular automaton), together with finite element solvers of averaged conservation equations. Use of automatic FE remeshing based on error estimator is also largely present.
    Characterization methods are used such as scanning electron microscope, energy dispersive x-ray spectrometry, image analysis and metallography. Collaborations are developed with laboratories and industries to access results of experimental techniques such as in-situ and in real-time radiography and topography using the European Synchrotron Radiation Facility (IM2NP, Marseille, F), solidification of levitated droplets (DLR, Köln, D), or microgravity solidification (ESA, Noordwijk, NL).
    Crystallization of polymers is mainly oriented toward experimental studies also using in-situ and in real-time observations under optical microscopy. Original apparatus are developed to further characterize crystallization kinetics of polymers under various thermal and pressure conditions.