Nondestructive characterization of structural ceramics

Journal Article · Mon Mar 31 23:00:00 EST 1986 · SAMPE Q.; (United States)

OSTI ID:5349931

Klima, S J; Basklini, G Y

Ultrasonic velocity and attenuation measurements were used to characterize density and microstructure in monolithic silicon nitride and silicon carbide. Research samples of these structural ceramics exhibited a wide range of density and microstructural variations. It was shown that bulk density variations correlate with and can be estimated by velocity measurements. Variations in microstructural features such as grain size or shape and pore morphology had a minor effect on velocity. However, these features had a pronounced effect on ultrasonic attenuation. The ultrasonic results are supplemented by low-energy radiography and scanning laser acoustic microscopy. 10 references.

• Research Organization: NASA, Lewis Research Center, Cleveland, OH
• OSTI ID: 5349931
• Journal Information: SAMPE Q.; (United States), Journal Name: SAMPE Q.; (United States) Vol. 17; ISSN SAMQA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACOUSTIC TESTING
CARBIDES
CARBON COMPOUNDS
CERAMICS
CRYSTAL STRUCTURE
DENSITY
MATERIALS TESTING
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NONDESTRUCTIVE TESTING
PHYSICAL PROPERTIES
PNICTIDES
POROSITY
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
TESTING
ULTRASONIC TESTING
VARIATIONS