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Effect of graphene nano-platelet reinforcement on the mechanical properties of hot pressed boron carbide based composite
- Source :
- Ceramics International. 44:9830-9838
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Boron carbide (B4C) based composites with graphene nano-platelet (GNP) as reinforcement have been prepared by hot pressing. Effect of GNP addition on mechanical properties of the composite, like, hardness, fracture toughness, flexural strength was evaluated. Phase evolution was studied by X-ray diffraction (XRD) and Raman spectroscopy. 2 vol% addition of GNP improved the density of the composite, which acted as a sintering aid. Further addition of GNP resulted in formation of the interconnected networks, agglomerates and interfacial porosities. Improved fracture toughness (KIC) but decreased flexural strength was observed with addition of GNP. Maximum fracture toughness of 5.41 ± 0.55 MPa m1/2 (by indentation method) and 4.52 ± 0.15 MPa m1/2 (by single edge notch bend (SENB) method) was obtained for 10 vol% GNP-B4C composite. Hardness and elastic modulus were also improved with 2 vol% addition of GNP. The observations have been explained with suitable mechanism and model, supported by microstructural and mechanical property data.
- Subjects :
- 010302 applied physics
Materials science
Process Chemistry and Technology
Composite number
Sintering
02 engineering and technology
Boron carbide
021001 nanoscience & nanotechnology
Hot pressing
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
Fracture toughness
Flexural strength
chemistry
Indentation
0103 physical sciences
Materials Chemistry
Ceramics and Composites
Composite material
0210 nano-technology
Elastic modulus
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........106e49f12d1b9432007969d1cfa20350