▎ 摘　　要

L. Forraiova-Kvetkova, F. Dorcakova(a), M. Nosko(b), J. Dusza(a), P. Kun(c), and Cs. Balazsi(c) ((a)Institute of Materials Research of SAS, Kosice, Slovakia, (b)Institute of Materials & Machine Mechanics SAS Bratislava, Slovakia, (c)Research Institute for Technical Physics and Materials Science, Ceramics and Nanocomposites Department, Budapest, Hungary): Indentation Toughness of Si3N4 Reinforced with Graphene Platelets The aim of the present contribution is to study the influence of graphene platelets addives on the fracture toughness of Si3N4-graphene system. The experimental materials were silicon nitride with various types of graphene additives, multilayer graphene, exfoliated graphene nanoplatelets and nano graphene platelets. The indentation toughness was measured using indentation fracture method and was calculated using the Shetty's equation. According to the result the composites exhibit higher fracture toughness in comparison to the monolithic material. The highest fracture toughness was found in the case of composite with multilayer graphene platelets. Scanning electron microscope was used for the characterization of toughening mechanisms.