Failure prediction of Si/sub 3/N/sub 4/ ceramics by NDE (nondestructive evaluation)

Conference · Wed Oct 01 00:00:00 EDT 1986

OSTI ID:7077982

Singh, J P; Roberts, R A; Vaitekunas, J J; Ellingson, W A

Results are presented for the nondestructive evaluation (NDE) and fractographic observations of the critical flaws in hot-pressed Si/sub 3/N/sub 4/ with Fe inclusions. The NDE methods employed included low-energy contact radiography with digital image enhancement, through-transmission ultrasonic, and backscatter ultrasonic imaging. A comparison of NDE and fractography results indicate that the backscatter ultrasonic method may be more suitable than low-kV contact radiography for the detection of near-surface flaws.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7077982
• Report Number(s): CONF-870505-3; ON: DE87006996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ACOUSTIC TESTING
ALLOYS
BACKSCATTERING
DEFECTS
FABRICATION
FRACTOGRAPHY
HOT PRESSING
INCLUSIONS
INDUSTRIAL RADIOGRAPHY
IRON ADDITIONS
IRON ALLOYS
MATERIALS TESTING
MATERIALS WORKING
NITRIDES
NITROGEN COMPOUNDS
NONDESTRUCTIVE TESTING
PNICTIDES
PRESSING
SCATTERING
SILICON COMPOUNDS
SILICON NITRIDES
SOUND WAVES
TESTING
ULTRASONIC TESTING
ULTRASONIC WAVES