Ghosh, S and Guha, A and Krishna, K M and Mukhopadhyay, Anoop Kumar and Maiti, Himadri Sekhar (2006) Tape cast multilayer composite of nano zirconia with high toughness. Materials and Manufacturing Processes , 21 (7 ). pp. 662-668. ISSN 1042-6914

PDF - Published Version Restricted to Registered users only Download (867Kb)

Abstract

During the last decade, worldwide attention of researchers has focused on nano-ceramic composites with superior mechanical behavior and improved reliability for structural applications. Here we report the development of a multi-layer composite (MLC) of tape cast nano zirconia with high failure energy. The MLC samples were fabricated by thermocompression of green tapes prepared from 3 mole % yttria stabilized zirconia (3-YSZ) powder with a primary crystallite size of 27 nm. Depending on the number of layers, the MLC samples exhibited failure energy (238.97 KJm−3) more than two times higher than that of the single tape (≈107 KJm−3) with a reasonably high bi-axial flexural strength (≈630 MPa), high hardness (≈ 13 GPa at 49 N), and indentation fracture toughness nearly four times as high as that of the single tape. In addition, these MLC materials showed the presence of a R-curve behavior.

Item Type:	Article
Uncontrolled Keywords:	Composite, Crack deflection, Failure energy, Fracture, Hardness, Indentation, Microstructure, Multilayer, Nano zirconia, Strength, Tape-casting, Toughness, Transformation-toughening
Subjects:	UNSPECIFIED
Divisions:	UNSPECIFIED
Depositing User:	Mrs Chandana Patra
Date Deposited:	28 Dec 2011 06:05
Last Modified:	05 Apr 2016 09:13
URI:	http://cgcri.csircentral.net/id/eprint/45

Actions (login required)

View Item