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Ultrasonic Characterization of Ceramics FREE

[+] Author Affiliations
Michael J. Slavin, Jeffrey J. Gruber

U.S. Army Materials Technology Laboratory, Watertown, MA

Paper No. 87-GT-1, pp. V005T12A001; 6 pages
doi:10.1115/87-GT-1
From:
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Process Industries; General
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7927-6
  • Copyright © 1987 by ASME

abstract

This paper discusses ultrasonic nondestructive evaluation (NDE) methods that are useful for ceramic characterization. These methods are: ultrasonic velocity measurements, velocity and defect C-scans and attenuation measurements. The way in which the ultrasonic measurements are influenced by the ceramic’s structure and properties is examined. The ultrasonic techniques discussed in this paper are routinely used as part of an inspection/quality control procedure of ceramics for armor and heat engine applications. Sintered beta silicon carbide (β-SiC), sintered alpha silicon carbide (α-SiC) and hot pressed titanium diboride (TiB2) have been well characterized by these techniques. Elastic modulus values as determined from velocity measurements agree very well with values measured from flexural tests. Correlations between the velocity C-scans, elastic properties and densities have also been determined. The limitations and potential of each of the ultrasonic techniques are discussed.

Copyright © 1987 by ASME
Topics: Ceramics
This article is only available in the PDF format.

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