Ceramic Matrix Graphene and Carbon Nanotube Composites

Balázsi, Katalin and Furko, Monika and Balázsi, Csaba (2021) Ceramic Matrix Graphene and Carbon Nanotube Composites. In: Module in Materials Science and Materials Engineering. Elsevier B.V., Amsterdam. ISBN 9780128035818

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Abstract

Si3N4 is known as insulating ceramic material with extreme high hardness, strength and toughness over a wide range of temperatures. The addition of a second phase (filler or nanoparticle) to the ceramic matrix can result in novel properties of final composite, which are different from the properties of starting matrix. Nowadays in the case of Si3N4, the most used additive phase is carbon in various forms (carbon nanotube, carbon black or graphene). Due to this, the resultant ceramic matrix composites (CMC) have properties of great interest for various structural applications. In this review, preparation routes and possibility of changing the final properties of CMC by the addition of a second phase are discussed. The relationship of preparation-structure-properties of Si3N4/carbon nanotubes and Si3N4/graphene composites prepared by attrition milling and sintering is also investigated. It has been proven that only 1 wt% addition had crucial role to enhancing of electrical and tribological properties. On the other hand, the final mechanical properties of CMC are directly influenced by increasing the content of graphene or carbon nanotubes up to 5 wt%.

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