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Title: Synthesis, microstructure and mechanical properties of yttria stabilized zirconia (3YTZP) - multi-walled nanotube (MWNTs) nanocomposite by direct in-situ growth of MWNTs on zirconia particles
Authors: Datye, Amit ×
Wu, Kuang-Hsi
Gomes, George
Monroy, Vivana
Lin, Hua-Tay
Vleugels, Jef
Vanmeensel, Kim #
Issue Date: Nov-2010
Publisher: Elsevier Applied Science Publishers
Series Title: Composites Science and Technology vol:70 issue:14 pages:2086-2092
Abstract: In this research, Yttria Stabilized Zirconia (3YTZP) - carbon nanotube (CNT) composites are fabricated by direct in-situ growth of CNTs on the Zirconia particles, followed by densification via the Spark Plasma Sintering (SPS) technique. Scanning electron microscopy analysis of the 3YTZP-CNT powders shows uniform distribution of CNTs without the formation of agglomerates frequently seen with the traditional ex-situ mixing of CNTs in ceramic compositions. The samples were sintered to nearly 100% theoretical density and with a finer grain size microstructure. High Resolution Transmission Electron Microscopy (HRTEM) and Raman Spectroscopy confirm CNT retention in the sintered nanocomposites up to 1600 degrees C. The flexural strength increases from similar to 260 MPa for samples without CNTs sintered at 1600 degrees C to 312 MPa for samples with similar to 4 wt.% CNTs sintered at the same temperature. A corresponding increase in the indentation fracture toughness is also observed for samples with similar to 4 wt.% CNTs sintered at 1600 degrees C as compared to samples sintered at the same temperature without CNTs. Published by Elsevier Ltd.
URI: 
ISSN: 0266-3538
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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