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Mechanical and electrical properties of low SWNT content 3YTZP composites

AuthorsPoyato, Rosalía ; Macías-Delgado, Aurelio; García-Valenzuela, A.; Gallardo-López, A.; Morales-Rodríguez, A.; Muñoz, A. ; Domínguez-Rodríguez, Alejandro
KeywordsMechanical properties
Carbon nanotubes
Electrical properties
Issue Date2015
CitationJournal of the European Ceramic Society 35: 2351- 2359 (2015)
Abstract© 2015 Elsevier Ltd. Fully dense 3mol% Y2O3-ZrO2 (3YTZP) composites with low single wall carbon nanotube content (0.5, 1 and 1.5vol% SWNT) were prepared by colloidal processing and spark plasma sintering (SPS). SWNT were distributed at ceramic grain boundaries and also into agglomerates. Characterization of SWNT agglomerates indicated that increase in SWNT vol% does not imply an increase in agglomeration. SWNT agglomerate density was related to the evolution of hardness and fracture toughness with SWNT vol%. Electrical properties of the composites were characterized in a wide temperature range, and percolation threshold was estimated. A model allowing separation of the individual SWNT bundles contribution to resistance from the resistance due to junctions between bundles was proposed for composites with a percolating SWNT network.
Identifiersdoi: 10.1016/j.jeurceramsoc.2015.02.022
issn: 0955-2219
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