Nondestructive evaluation of structural ceramics
A review is presented on research and development of techniques for nondestructive evaluation and characterization of advanced ceramics for heat engine applications. Highlighted in this review are Lewis Research Center efforts in microfocus radiography, scanning laser acoustic microscopy (SLAM), scanning acoustic microscopy (SAM), scanning electron acoustic microscopy (SEAM), and photoacoustic microscopy (PAM). The techniques were evaluated by applying them to research samples of green and sintered silicon nitride and silicon carbide in the form of modulus-of-rupture bars containing seeded voids. Probabilities of detection of voids were determined for diameters as small as 20 microns for microfucus radiography, SLAM, and SAM. Strengths and limitations of the techniques for ceramic applications are identified. Application of ultrasonics for characterizing ceramic microstructures is also discussed.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6544402
- Report Number(s):
- N-87-18109; NASA-TM-88978; E-3446; NAS-1.15:88978; CONF-861002-7
- Resource Relation:
- Conference: Automotive technology development contractors' coordination meeting, Dearborn, MI, USA, 27 Oct 1986
- Country of Publication:
- United States
- Language:
- English
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CERAMICS
COMPOSITE MATERIALS
DETECTION
INDUSTRIAL RADIOGRAPHY
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RELIABILITY
REVIEWS
CARBIDES
CARBON COMPOUNDS
DOCUMENT TYPES
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MATERIALS TESTING
NITRIDES
NITROGEN COMPOUNDS
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360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies