Refractories Research at Refractories Research at

Polytech’Orléans :Polytech’Orléans : Design, Corrosion and Thermo-Design, Corrosion and Thermo-

mechanical Modellingmechanical Modelling

Research group : Refractory materials, design and corrosionHead : Jacques POIRIER, Tel. : 33 (0) 2 38 41 70 51, jacques.poirier@univ-orleans.fr

Activities Corrosion of refractory materials by gases, metals and liquid oxides at hightemperature (between 1200 and 1700°C)

- Identification of the chemical reactions - Transport of the liquid phases in the capillary network- Modelling of the thermo chemical mechanisms associated these reactions

 Evolution of the mineral phases and the glasses at high temperature      - Micro-structural observations

-Thermodynamic interpretation and kinetic modelling  Refractory materials (design, making) for specific applications

Experimental facilities : Optical microscopy, scanning electron microscopy, X-ray analysis, poresizer measurement, laser granulometry, specific area measurement…. Heating up to 1700°C, simulation of thermal shocks and corrosion equipmentsHigh temperature spectroscopies (NMR, EPR, Infrared, Raman, Brillouin)

Research Center for Materials at High Temperature(CRMHT - UPR 4212 CNRS)

Polytech’Orléans, 8 rue Léonard de VinciF-45072 Orléans Cedex 2, France

Simulation of corrosion of a refractory material by Al2O3-CaO liquid oxides

Microstructures after corrosion

Research group : Thermo-mechanical modelling of refractory structuresHead: Alain GASSER, Tel. : 33 (0) 2 38 49 49 36, alain.gasser@univ-orleans.fr

Objective: to build tools for numerical simulation to design structures with ceramic materials.

Principle: construction of simplified equivalent material by multi-scales approach accounting for joint expansion and nonlinear behaviour according to the temperature.

Laboratory of Mechanics of Systems and ProcessesUMR 8106 CNRS – ENSAM – University of Orléans

Polytech’Orléans, 8 rue Léonard de VinciF-45072 Orléans Cedex 2, France

Damage simulation of a coal-fired power plant

Lead oven modelling(mesh, temperature field, Von Mises stresses in the metallic part)

Experimental set up and simulation facilities: tension-compression (10T), Finite Element Software (Abaqus, Castem, Patran/Nastran).

Scale of the structure(equivalent material)

Scale of the REVScale of thecomponents

Brick

Joint

Competences and collaborationThe development of methods and industrial tools allowing the choice of materials (for a given application) and the numerical analysis of structures with refractory parts. These numerical tools will be powerful only if they take into account the physicochemical and thermo-mechanical material properties.

Thermo-mechanicalbehaviour

Numericalsimulation

Corrosion

Evolution of mineral phases

Equivalentmaterial

Industrial partners in the following fields:

Raw materials, energy, metallurgy (iron and steel industry, foundries), ceramics

Thermo-chemical behaviour