Microstructures and mechanical properties of graphene platelets-reinforced spark plasma sintered tantalum diboride-silicon carbide composites
| Autor: | Erhan Ayas, Ibrahim Sackan, Ezgi Inci, Hakan Gasan, Kübra Gürcan |
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| Přispěvatelé: | İnci, Ezgi, Izmir Institute of Technology. Materials Science and Engineering |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Graphene Composite number Metals and Alloys Sintering SPS Microstructure Indentation hardness Surfaces Coatings and Films Electronic Optical and Magnetic Materials Intergranular fracture law.invention Biomaterials chemistry.chemical_compound UHTC Fracture toughness chemistry law Silicon carbide Microfluidization Composite material TaB2 |
| Zdroj: | Materials Research Express. 6:115215 |
| ISSN: | 2053-1591 |
| DOI: | 10.1088/2053-1591/ab4f3a |
| Popis: | Graphene nanoplates reinforcement (GNPs) TaB2-SiC composites were fabricated with Spark Plazma sintering (SPS) at 1850 degrees C with a-uniaxial pressure of 50 MPa and 10 min dwell time. Systematic investigation on the effect of GNP amount of densification, microstructural and mechanical properties (microhardness and fracture toughness) of the composites were presented. Density and hardness of composites decreased with the addition of GNP, while similar to 35% increase of fracture toughness value was obtained with GNP addition. The microstructural evaluation indicated that overlapped and agglomerated GNPs increased with an increasing amount of GNP in the composites and caused to decrease of density and hardness. On the other hand, GNP was retained in the composite form even with high process temperature (1850 degrees C) and cause toughening of composites with changing the fracture mode from transgranular to transgranular/intergranular fracture. GNP pull out, crack branching, crack bridging and crack deflection were observed as main toughening mechanisms. |
| Databáze: | OpenAIRE |
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