PSI - Issue 23

Ivo Dlouhy et al. / Procedia Structural Integrity 23 (2019) 431–438

438

Ivo Dlouhý et al. / Structural Integrity Procedia 00 (2019) 000 – 000

8

for both nanotubes and nanosheets. For carbon nanotubes incorporated into silica matrix, the fracture toughness increased linearly to 100-120 % relative to silica monoliths up to unusually high CNT loading. Boron nitride nanotubes, cylindrical and bamboo-like, incorporated into nanostructured tetragonal zirconia stabilized with 3 mol.% yttria contributed to significant increase of K IC , 2.5 wt.% addition produced 100 % K IC increase compared to the monolithic zirconia. BNNSs exploitation in BS glass matrix resulted in 45 % K IC increase. There was an improvement of 35 % in K IC of the composites with addition of 2.5 % GNSs. Toughening including necking, pull-out, crack bridging, crack deflection and crack branching were evidenced for silica matrix composites. Similar effects have been observed in alumina composites, e.g. when incorporating 0.8 vol.% of graphene (GNS) the improvement of the K IC was more than 40 %. Acknowledgements The support of the joint Mobility Project within Czech-Slovak scheme for the period 2018-2020 under CAS/SAS agreement is acknowledged (project Nr. SAV-18-12). Cho, J., Inam, F., Reece, M.J. et al., 2011. Carbon nanotubes: do they toughen brittle matrices? Journal of Materials Science 46, 4770-4779. Dlouhy, I., Boccaccini, A.R., 2001. Reliability of the chevron notch technique for fracture toughness determination in glass composites reinforced by continuous fibres, Scripta Materialia, 44 (3), 531-537. Fan, YC, Jiang, W., Kawasaki, A., 2012. Highly conductive few-layer graphene/Al2O3 nanocomposites with tunable charge carrier type. Advanced Functional Materials 22 (18), 3882-3229. Golberg, D., Bando, Y., Tang, C., and Yhi, C., 2007. Boron nitride nanotubes, Advanced Materials, 19 (18), 2413-2432. Kotoul, M., Pokluda, J. Sandera, P et al., 2008. Toughening effects quantification in glass matrix composite reinforced by alumina platelets, Acta Materialia, 56 (12), 2908-2918. Kun, P., Tapaszto, O., Weber, F. Balazsi, C., 2012. Determination of structural and mechanical properties of multilayer graphene added silicon nitride based composites. Ceramic International, 38 (1), 211-216. Mukhopadhyay, M., Mari, D., Hesabi, Z. R. et al., 2010. Understanding the mechanical reinforcement of uniformly dispersed multi walled carbon nanotubes in alumina/borosilicate glass ceramic, Acta Materialia, 19 (18), 2685-2697. Nieto, A., Bisht, A., Lahiri, D. et al., 2016. Graphene reinforced metal and ceramic matrix composites: a review, International Materials Reviews, 62 (5), 241-302. Porwal, H., Grasso, S., Reece, M. J., 2013a. Review of graphene-ceramic matrix composites. Advances in Applied Ceramics, 112 (8), 443-454. Porwal, H., Tatarko, P., Grasso, S. et al., 2013b. Graphene reinforced alumina nano-composites, Carbon 64, 359-369. Porwal, H., Tatarko, P., Grasso, S. et al, 2013c. Toughened and machinable glass matrix composites reinforced with graphene and graphene/oxide nano platelets, Science and Technology of Advanced Materials, 2013, 14 (5), 055007. Saggar, R., Porwal, H., Tatarko, P. et al., 2015. Boron nitride nanosheets reinforced glass matrix composites, Advances in Applied Ceramics 114 (S1) S26-S33. Singh, C., Shaffer, M., Windle, A.H., 2003. Production of controlled architectures of aligned carbon nanotubes by an injection chemical vapour deposition method, Carbon, 41(2), 359. Tatarko, P., Grasso, S., Porwal, H. et al, 2014. Boron nitride nanotubes as a reinforcement for brittle matrices, Journal of the European Ceramic Society, 34, 3339-3349. Taveri, G., Grasso, S., Gucci, F. et al, 2018. Bio-Inspired Hydro-Pressure Consolidation of Silica. Advanced Functional Materials, 28, Article No. 1805794 Verma, V., Jindal, V. K., Dharamvir, K., 2007. Elastic moduli of a boron nitride nanotube, Nanotechnology, 18 (43), 435711. Wang, J., Zhang, L., Zhao, G. et al., 2011. Selective synthesis of boron nitride nanotubes by self-propagation high temperature synthesis and annealing process. Journal of Solid State Chemistry, 184, 2478-84. Wei, X., Wang, M.S., Bando, Y., Golberg, D., 2010. Tensile tests on individual multi-walled boron nitride nanotubes, Advanced Materials., 22 (43), 4895-4899. Ye, F., Liu, L., Wang, Y. et al., 2006. Preparation and mechanical properties of carbon nanotube reinforced barium aluminosilicate glass-ceramic composites, Scripta Materialia, 55 (10), 911-914. Zhang, L., Zhang, XG, Chen, Y. et al., 2014. Interfacial stress transfer in a graphene nanosheet toughened hydroxyapatite composite, Applied Physics Letters 105 (16), 161908. References Anstis, G.R., Chantikul, P., Lawn, B.R., Marshall, D.B., 1981. A critical evaluation of indentation techniques for measuring fracture toughness, Journal of American Ceramic Society, 64 (9), 533-538. Bertolla L., Dlouhy, I., Bartonickova, E., et al., 2019. Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions, Cellulose, 26 (27) 4325-4344.