Refractories Research at Polytech’Orléans : Design, Corrosion and Thermo-mechanical Modelling

1. Refractories Research at Polytech’Orléans : Design, Corrosion and Thermo-mechanical Modelling

2. Research Center for Materials at High Temperature (CRMHT - UPR 4212 CNRS) Polytech’Orléans, 8 rue Léonard de Vinci F-45072 Orléans Cedex 2, France Simulation of corrosion of a refractory material by Al2O3-CaO liquid oxides Microstructures after corrosion • Research group : Refractory materials, design and corrosion • Head : 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 high • temperature (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 equipments • High temperature spectroscopies (NMR, EPR, Infrared, Raman, Brillouin) Physico-chimistry

3. Brick Joint Scale of the REV Scale of the structure (equivalent material) Scale of the components Laboratory of Mechanics of Systems and Processes UMR 8106 CNRS – ENSAM – University of Orléans Polytech’Orléans, 8 rue Léonard de Vinci F-45072 Orléans Cedex 2, France Researchgroup : Thermo-mechanical modelling of refractory structures Head: 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. Experimental set up and simulation facilities: tension-compression (10T), Finite Element Software (Abaqus, Castem, Patran/Nastran). Thermo-mechanics Damage simulation of a coal-fired power plant Lead oven modelling (mesh, temperature field, Von Mises stresses in the metallic part)

4. s e Competences and collaboration The 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. Numerical simulation Thermo-mechanical behaviour From ceramics to modelling of structures Corrosion Equivalent material Thermo-chemical behaviour Evolution of mineral phases Industrial partners in the following fields: Raw materials, energy, metallurgy (iron and steel industry, foundries), ceramics