Phani, Kalyan Kumar and Mukherjee, Sampad and Basu, Debabrata (1996) Ultrasonic characterization of zirconia-toughened alumina ceramics. Journal of the American Ceramic Society, 79 (12). pp. 3331-3335. ISSN 0002-7820

PDF - Published Version Restricted to Registered users only Download (3072Kb) | Request a copy

Abstract

Ultrasonic pulse-echo technique was used for the characterization of sintered zirconia-toughened alumina (ZTA) ceramics. The variation of the ultrasonic velocity and elastic constants with the volume fraction of zirconia in the alumina matrix was studied. The ultrasonic velocity variation in these materials also was modeled using a mean-value approach, The zirconia grains in ZTA were modeled by oblate spheroids, whose aspect ratio was estimated from the two-dimensional microstructure of the material using stereological relations, The aspect ratio was then used as a parameter to estimate the ultrasonic velocity variation in the material using self-consistent spheroidal inclusion theory, and the model was validated by comparing the estimated data with the measured velocity values, which showed very good agreement.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	30 Jul 2012 07:00
Last Modified:	06 Mar 2014 08:13
URI:	http://cgcri.csircentral.net/id/eprint/1672

Actions (login required)

View Item