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Carbon nanotubes: do they toughen brittle matrices?
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SYSNO ASEP 0359267 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Carbon nanotubes: do they toughen brittle matrices? Tvůrce(i) Chao, J. (GB)
Inam, F. (GB)
Reece, M.J. (GB)
Chlup, Zdeněk (UFM-A) RID, ORCID
Dlouhý, Ivo (UFM-A) RID, ORCID
Shaffer, M.S.P. (GB)
Boccaccini, A. R. (GB)Celkový počet autorů 7 Zdroj.dok. Journal of Materials Science. - : Springer - ISSN 0022-2461
Roč. 46, č. 14 (2011), s. 4770-4779Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova fracture toughness ; carbon nanotube ; silica glass Vědní obor RIV JL - Únava materiálu a lomová mechanika CEP GA101/09/1821 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000289903200005 DOI 10.1007/s10853-011-5387-x Anotace The development of a model CNT-brittle matrix composite system, based on SiO2 glass containing well-dispersed CNTs at up to 15 wt%, allows a direkt assessment of the effect of the nanoscale filler on fracture toughness (KIC). Samples were prepared by colloidal heterocoagulation followed by spark plasma sintering. Detailed KIC easurements, using both indentation and notched beam techniques, show a linear improvement with CNT content, with up to a twofold increase of fracture toughness at maximum loading. The results from the two methods used in this study show equivalent trends but differing absolute values; the relative merits of these two approaches to measuring nanocomposite toughness are compared. Possible toughening mechanisms associated with CNT pull-out, crack bridging, and crack deflection are identified, and discussed quantitatively, drawing on conventional short-fibre composite theory and the potential effects of scaling fibre diameter. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
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