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      Investigation of MWCNTs addition on mechanical properties of cordierite glass-ceramic composites

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          Abstract

          Cordierite-based glass/ceramic composites reinforced with different volume fractions of carbon nano-tubes were successfully prepared by isostatic pressing. Results showed the increase of flexural strength and fracture toughness of cordierite-based glass/carbon nano-tube composites with carbon nano-tube content. By incorporation of 5 vol.% carbon nano-tubes, the flexural strength and fracture toughness of the composites were increased by up to 50% and 72% compared to the unreinforced cordierite-based glass matrix, respectively. Scanning electron microscopy images indicated that the main strengthening and toughening mechanisms are load transfer, fiber pull out and crack bridging.

          Most cited references12

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          Single-wall carbon nanotubes as attractive toughening agents in alumina-based nanocomposites.

          The extraordinary mechanical, thermal and electrical properties of carbon nanotubes have prompted intense research into a wide range of applications in structural materials, electronics, chemical processing and energy management. Attempts have been made to develop advanced engineering materials with improved or novel properties through the incorporation of carbon nanotubes in selected matrices (polymers, metals and ceramics). But the use of carbon nanotubes to reinforce ceramic composites has not been very successful; for example, in alumina-based systems only a 24% increase in toughness has been obtained so far. Here we demonstrate their potential use in reinforcing nanocrystalline ceramics. We have fabricated fully dense nanocomposites of single-wall carbon nanotubes with nanocrystalline alumina (Al2O3) matrix at sintering temperatures as low as 1,150 degrees C by spark-plasma sintering. A fracture toughness of 9.7 MPa m 1/2, nearly three times that of pure nanocrystalline alumina, can be achieved.
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            Carbon nanotubes in novel ceramic matrix nanocomposites

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              Strengthening and toughening of carbon nanotube reinforced alumina nanocomposite fabricated by molecular level mixing process

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                Author and article information

                Journal
                ijmr
                International Journal of Materials Research
                Carl Hanser Verlag
                1862-5282
                2195-8556
                12 February 2019
                : 110
                : 2
                : 174-177
                Affiliations
                1 Ceramic division, Materials & Energy Research Center, Karaj, Alborz, Iran
                Author notes
                [* ] Correspondence address, Esmail Salahi, Ceramic Division, Materials and Energy Research Centre, P.O. Box: 14155-4777, Tehran, Iran, Tel:+98 2636204131, Fax:+98 263621888, Email: e.salahi@ 123456merc.ac.ir
                Article
                MK111732
                10.3139/146.111732
                948072ed-855c-4e7d-9af4-51776996936e
                © 2019, Carl Hanser Verlag, München
                History
                : 11 June 2018
                : 18 August 2018
                : 2 January 2019
                Page count
                References: 15, Pages: 4
                Categories
                Short Communications

                Materials technology,Materials characterization,Materials science
                composites,Carbon nano-tubes,Mechanical properties,Toughness,Cordierite-based glass

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