Ultrasonic characterization of zirconia-toughened alumina ceramics

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08116.x· OSTI ID:422746

Phani, K K; Mukherjee, S; Basu, D ^[1]

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1. Jadavpur Univ., Calcutta (India). Central Glass and Ceramic Research Inst.

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.

• Sponsoring Organization: USDOE
• OSTI ID: 422746
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 12 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CONCENTRATION RATIO
CORRELATIONS
ELASTICITY
EXPERIMENTAL DATA
MATHEMATICAL MODELS
MICROSTRUCTURE
POROSITY
THEORETICAL DATA
ULTRASONIC TESTING
VELOCITY
ZIRCONIUM OXIDES