Application of NDE methods to green ceramics: initial results

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5236631

Kupperman, D S; Karplus, H B; Poeppel, R B; Ellingson, W A; Berger, H; Robbins, C; Fuller, E

The effectiveness of microradiography, ultrasonic methods, unclear magnetic resonance, and neutron radiography was assessed for the nondestructive evaluation of green (unfired) ceramics. The application of microradiography to ceramics is reviewed, and preliminary experiments with a commercial microradiography unit are described. Conventional ultrasonic techniques are difficult to apply to flaw detection green ceramics because of the high attenuation, fragility, and couplant-absorbing properties of these materials. However, velocity, attenuation, and spectral data were obtained with pressure-coupled transducers and provided useful informaion related to density variations and the presence of agglomerates. Nuclear magnetic resonance (NMR) imaging techniques and neutron radiography were considered for detection of anomalies in the distribution of porosity. With NMR, areas of high porosity might be detected after the samples are doped with water. In the case of neutron radiography, although imaging the binder distribution throughout the sample may not be feasible because of the low overall concentration of binder, regions of high binder concentration (thus high porosity) should be detectable.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5236631
• Report Number(s): CONF-8310205-8; ON: DE84006411
• Resource Relation: Conference: TMS-AIME fall meeting, Philadelphia, PA, USA, 2 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
CERAMICS
NONDESTRUCTIVE TESTING
BINDERS
DEFECTS
INDUSTRIAL RADIOGRAPHY
MAGNESIUM OXIDES
NEUTRON RADIOGRAPHY
NUCLEAR MAGNETIC RESONANCE
POROSITY
SILICON CARBIDES
SILICON NITRIDES
SPINELS
ULTRASONIC TESTING
ACOUSTIC TESTING
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
MAGNESIUM COMPOUNDS
MAGNETIC RESONANCE
MATERIALS TESTING
MINERALS
NITRIDES
NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
RESONANCE
SILICON COMPOUNDS
TESTING
420500* - Engineering- Materials Testing
360200 - Ceramics
Cermets
& Refractories