Reaksiyon Bağlı Silisyum Nitrür Seramiklerinde Sinterleme İlavesinin Mikroyapı ve Antibakteriyel Davranışa Etkisinin İncelenmesi

Silicon nitride (Si3N4) is a superior non-oxide ceramic material generally preferred for high temperature and structural applications. Besides being a very hard material, it is also possible to achieve relatively high toughness values among the ceramic materials by the formation of elongated beta () grains. In addition to these properties, by the understanding of its biocompatibility, the studies to increase the application potential of these materials as bio ceramics is also increased in the last decade. In this study, production of porous Si3N4 ceramics which is advantageous by means of the integration of these materials with the surrounding biological tissue was aimed using reaction bonding technique. The effect of CaO, Y2O3 ve CeO2 sintering additives on the physical and microstructural properties and as a result of these two facts, the antibacterial behavior was investigated. Obtained results revealed that CeO2 is a disadvantageous and Y2O3 is an advantageous sintering additive for both the E. coli and S. aureus bacteria. CaO system is resulted in decreased bacterial poliferation for E. coli and increased poliferation for S. aureus.