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Synthèse et Caractérisation des mélanges de poudres céramiques à base de TiC-Al2O3, destinés à la compaction à chaud.

Auteur : Hadda REZZAG
Année : 2010
Domaine : Métallurgie
Type : Mémoire de magister
Etablissement : Université Badji Mokhtar de Annaba
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : céramique, poudre, réduction, frittage

Résumé :

The ceramic base TiC-Al2O3, also known as the "black pottery" which finds wide use as materials for cutting tool especially for the finishing of cast iron and steel disks. Our study focused on the development of the black ceramic processes by metallothermal followed by sintering under load. This technology significantly reduces the duration of the process, and therefore the cost of production materials. For this purpose, several mixtures of powders were prepared by the techniques of powder metallurgy. Combustion was used for the direct mixing TiC-Al2O3.Our purpose is to understand the influence of parameters such as particle size and sintering temperature under load on the properties of the tablet. The additions of Mg, SiO2, B2O3, boron introduced into the basic mixture, have implications for the formation of new phases and significant changes in the morphology of the ceramic and the properties.