Ultrasonic NDE of structural ceramics for power and propulsion systems
A review of research investigations of several ultrasonic evaluation techniques applicable to structural ceramics for advanced heat engines is presented. This review highlights recent work conducted under the sponsorship of and at the Lewis Research Center. Results obtained with scanning acoustic microscopy, scanning laser acoustic microscopy, photo acoustic microscopy, and scanning electron acoustic microscopy are compared. In addition to these flaw imaging techniques, microstructure characterization by analytical ultrasonics is described. The techniques were evaluated by application to research samples of monolithic silicon nitride and silicon carbide in the form of discs and bars containing naturally occurring and deliberately-introduced flaws and microstructural anomalies. Strengths and limitations of the techniques are discussed.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6093986
- Report Number(s):
- N-87-26362; NASA-TM-100147; E-3705; NAS-1.15:100147; CONF-8709161-
- Country of Publication:
- United States
- Language:
- English
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Cermets
& Refractories-- Structure & Phase Studies
ACOUSTIC TESTING
CARBIDES
CARBON COMPOUNDS
CERAMICS
DOCUMENT TYPES
EVALUATION
MATERIALS TESTING
NITRIDES
NITROGEN COMPOUNDS
NONDESTRUCTIVE TESTING
PNICTIDES
REVIEWS
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
TESTING
ULTRASONIC TESTING