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Ceramics: Sintering and Microstructure

Practical classes "Ceramics & Colloids ": TP3 Sintering 1 TP3 - Ceramics: Sintering and Microstructure Responsable: Aslam Kunhi Mohamed (MXD 334, Tel: 36894) 1. introduction After the initial molding of the ceramic , whether by slip casting or dry pressing, it is still necessary to densify the compacted powder samples (green bodies) to form a continuous 3D structure and thus to get ceramic pieces appropriate for the selected application. Usually this is done by a Sintering process which is a consolidation and densification step of the granular compact through the action of heat. During this stage, the Microstructure of the samples evolves (see Figure 1). Figure 1 Sintered Powder and Microstructure . Source Krell et al.[8]. Pores, second phases and grain size have all an important influence on many of the final properties of ceramics. In general, the porosity has a more pronounced effect than a second phase or the grain size, because most of the desired properties ( elasticity or thermal conductivity) are zero or close to zero in the pores.

TP3 - Ceramics: Sintering and Microstructure Responsable: Aslam Kunhi Mohamed (MXD 334, Tel: 36894) 1. Introduction After the initial molding of the ceramic, whether by slip casting or dry pressing, it is still necessary to densify the compacted powder samples (green bodies) to form a continuous 3D structure and thus to

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