Number of the records: 1
Carbon nanotubes: do they toughen brittle matrices?
- 1.
SYSNO ASEP 0359267 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Carbon nanotubes: do they toughen brittle matrices? Author(s) 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)Number of authors 7 Source Title Journal of Materials Science. - : Springer - ISSN 0022-2461
Roč. 46, č. 14 (2011), s. 4770-4779Number of pages 10 s. Language eng - English Country US - United States Keywords fracture toughness ; carbon nanotube ; silica glass Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GA101/09/1821 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000289903200005 DOI 10.1007/s10853-011-5387-x Annotation 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
Number of the records: 1