NDLI: Hardness and flexural strength of single-walled carbon nanotube/alumina composites

Content Provider	Springer Nature Link
Author	Gallardo López, A. Poyato, R. Morales Rodríguez, A. Fernández Serra, A. Muñoz, A. Domínguez Rodríguez, A.
Copyright Year	2014
Abstract	This work adds new experimental facts on room temperature hardness and flexural strength of alumina and composites with 1, 2, 5 and 10 vol% single-walled carbon nanotubes (SWNT) with similar grain size. Monolithic Al$_{2}$O$_{3}$ and composites were spark plasma sintered (SPS) in identical conditions at 1300 °C, achieving high density, submicrometric grain size and a reasonably homogeneous distribution of SWNT along grain boundaries for all compositions with residual agglomerates. Vickers hardness values comparable to monolithic alumina were obtained for composites with low (1 vol%) SWNT content, though they decreased for higher concentrations, attributed to the fact that SWNT constitute a softer phase. Three-point bending flexural strength also decreased with increasing SWNT content. Correlation between experimental results and microstructural analysis by electron microscopy indicates that although SWNT agglomerates have often been blamed for detrimental effects on the mechanical properties of these composites, they are not the main cause for the reported decay in flexural strength.
Starting Page	7116
Ending Page	7123
Page Count	8
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	49
Issue Number	20
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2014-07-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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