Spark plasma sintering : couplage entre les approches : modélisation, instrumentation et matériaux

Abstract : The "Spark Plasma Sintering" process allows very high consolidation kinetics (densification, assembly, forging) of materials (powder, porous, nanostructured). However, some difficulties remains on this innovative process, particularly in terms of temperature control, microstructural homogeneity especially for complex shapes ... and industrial productivity. To solve these problems, an electro-thermo-mechanical-microstructural model is identified: i) using a thin instrumentation of the machine for the Thermo-Electric part including a reverse approach to evaluate the contact resistances, ii) by in situ creep and compression tests for mechanical microstructural-part. The resulting model has helped to find solutions for microstructural homogenization of the parts, for simultaneously densify of large numbers of parts (modifying the flow of electric current) and/or complex shapes (intervention sacrificial parts).
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Charles Manière. Spark plasma sintering : couplage entre les approches : modélisation, instrumentation et matériaux. Matériaux. Université Paul Sabatier - Toulouse III, 2015. Français. ⟨NNT : 2015TOU30219⟩. ⟨tel-01362029⟩

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