Synergistic effect of carbon nanotubes on the properties of hot pressed boron carbide
| Autor: | Madangopal Krishnan, Kinshuk Dasgupta, K.V. Ravikanth, Rajath Alexander, Amit P. Srivastava |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Nanotube Materials science Scanning electron microscope chemistry.chemical_element 02 engineering and technology Boron carbide Carbon nanotube 021001 nanoscience & nanotechnology 01 natural sciences law.invention chemistry.chemical_compound Fracture toughness chemistry Flexural strength Mechanics of Materials Transmission electron microscopy law 0103 physical sciences Materials Chemistry General Materials Science Composite material 0210 nano-technology Boron |
| Zdroj: | Materials Today Communications. 17:450-457 |
| ISSN: | 2352-4928 |
| DOI: | 10.1016/j.mtcomm.2018.10.015 |
| Popis: | Hot pressed boron carbide–carbon nanotube (B4C–CNT) composites have been fabricated as potential materials for armour application. The effect of CNT addition (with 2, 5 and 10 vol%) on the hardness, fracture toughness and flexural strength of the composites has been evaluated. 5 vol% addition of CNT was found to be optimum with superior mechanical properties to that of monolithic B4C. The fracture toughness was improved from 2.56 to 5.65 MPa√m that was attributed to crack branching, crack bridging and crack deflection by CNT as was evident from scanning electron microscopy. Transmission electron microscopy could bring out the clear and continuous interface between B4C and CNT. However, at very high CNT vol% (10 vol %) the mechanical properties slightly deteriorated due to agglomeration. The experimentally obtained data were fitted with suitable mathematical models. |
| Databáze: | OpenAIRE |
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