Development of nondestructive evaluation methods and prediction of effects of flaws on the fracture behavior of structural ceramics

Conference · Sun Apr 01 00:00:00 EST 1990

OSTI ID:6892244

Ellingson, W A; Singh, J P; Gopalsami, N; Dieckman, S L; Chu, C -Y ^[1]; Hentea, T ^[2]; Rizo, P ^[3]

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1. Argonne National Lab., IL (USA)
2. Purdue Univ., Hammond, IN (USA)
3. CEA Centre d'Etudes Nucleaires de Grenoble, 38 (France). Lab. d'Electronique et de Technologie de l'Informatique

To establish predictive performance (i.e., fracture behavior) of structural ceramic composites, we undertook in combination (1) a study of flaws and material variations as they relate to mechanical properties and (2) development of non-destructive devaluation (NDE) methods suitable for obtaining data on flaws and material variations. Effects of whisker addition on development of flaw population and the resulting mechanical properties were evaluated for both green (cold-pressed) and dense (hot-pressed) Si{sub 3}N{sub 4}-whisker-reinforced Si{sub 3}N{sub 4} matrix composites. To detect critical flaws in these composites, microfocus x-ray computed tomography and ultrasonic NDE methods were used. In addition, a nuclear magnetic resonance (NMR) facility was designed for use on composites. 14 refs., 6 figs, 3 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6892244
• Report Number(s): CONF-900546-2; ON: DE90011092
• Resource Relation: Conference: 4. conference on fossil energy materials, Oak Ridge, TN (USA), 15-17 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
COAL
COMBUSTION
SILICON CARBIDES
MECHANICAL PROPERTIES
SILICON NITRIDES
CERAMICS
FRACTURE PROPERTIES
GRAIN SIZE
HEAT ENGINES
MICROSTRUCTURE
NONDESTRUCTIVE TESTING
NUCLEAR MAGNETIC RESONANCE
POROSITY
TOMOGRAPHY
WHISKERS
CARBIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
CRYSTALS
DIAGNOSTIC TECHNIQUES
ENERGY SOURCES
ENGINES
FOSSIL FUELS
FUELS
MAGNETIC RESONANCE
MATERIALS
MATERIALS TESTING
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
OXIDATION
PNICTIDES
RESONANCE
SILICON COMPOUNDS
SIZE
TESTING
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
330100 - Internal Combustion Engines
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties