Sarkar, Soumya and Das, Probal Kumar (2012) Microstructure and physicomechanical properties of pressureless sintered multiwalled carbon nanotube/alumina nanocomposites. Ceramics International, 38 (1). pp. 423-432. ISSN 0272-8842

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Multiwalled carbon nanotube (MWCNT)/alumina (Al(2)O(3)) nanocomposites containing CNT from 0.15 vol.% to 2.4 vol.% have been successfully fabricated by simple wet mixing of as-received commercial precursors followed by pressureless sintering. Extent of densification of nanocomposites sintered at low temperature (e.g. 1500 degrees C) was <90%, but increased up to similar to 99% when sintered at 1700 degrees C and offered superior performance compared to pure Al(2)O(3). Nanocomposites containing 0.3 vol.% MWCNT and sintered at 1700 degrees C for 2 h in Argon led to similar to 23% and similar to 34% improvement in hardness and fracture toughness, respectively, than monolithic Al(2)O(3). In addition, the highest improvement (similar to 20%) in bending strength was obtained for 0.15 vol.% MWCNT/Al(2)O(3) nanocomposite compared to pure Al(2)O(3). Weibull analysis indicated reliability of nanocomposites increased up to 0.3 vol.% MWCNT, whereas, beyond that loading consistency was the same as obtained for pure Al(2)O(3). Detailed microstructure and fractographic analysis were performed to assess structure-property relationship of present nanocomposites. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Sintering; Electron microscopy; Nanocomposites; Mechanical properties
Subjects: Engineering Materials
Divisions: Non-Oxide Ceramics &amp; Composites
Depositing User: Bidhan Chaudhuri
Date Deposited: 05 Jun 2012 10:10
Last Modified: 05 Jun 2012 10:10

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