Focused ultrasonic backscatter technique for near-surface flaw detection in structural ceramics

Conference · Mon Jun 01 04:00:00 EDT 1987

OSTI ID:5681063

Roberts, R A

This paper describes a focused ultrasonic backscatter technique that is currently being used at Argonne for the detection of near-surface flaws in ceramic modulus-of-rupture (MOR) bars. The technique exploits the generation of leaky surface waves in such a way that precise transducer positioning is not critical; for this reason, it is a potential candidate for the inspection of curved surfaces. Included in the presentation of results are the detection of near-surface flaws in Si/sub 3/N/sub 4/ MOR bars, and a correlation of NDE and fractography results after failure in four-point bending. 5 refs., 7 figs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5681063
• Report Number(s): CONF-8704231-3; ON: DE88003112
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ACOUSTIC TESTING
BACKSCATTERING
CERAMICS
DEFECTS
DETECTION
IMAGES
MATERIALS TESTING
NITRIDES
NITROGEN COMPOUNDS
NONDESTRUCTIVE TESTING
PNICTIDES
SCATTERING
SILICON COMPOUNDS
SILICON NITRIDES
STRESSES
TESTING
ULTRASONIC TESTING