Study of high temperature failure mechanisms in ceramics. Final report, 1 April 1985-31 March 1988

Technical Report · Wed Jun 01 04:00:00 EDT 1988

OSTI ID:6886076

Page, R A; Lankford, J

This report summarizes the results of a fundamental study involving experimental characterization and analytical modeling of grain-boundary cavitation and creep crack growth in structural ceramics exposed to pure tensile loading. The major experimental techniques employed in the program are the use of small-angle neutron scattering to characterize cavity nucleation and growth and stereo-imaging analysis to characterize the stress and strain fields associated with growing creep cracks. The major accomplishments described in the report include the design, construction, and successful testing of a creep apparatus that permits creep testing of ceramics under pure tensile loading, the determination of surface-preparation conditions that are adequate for the stereo-imaging analysis, and the conduct of a series of creep tests designed to characterize the kinetics of damage accumulation under pure tensile loading.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA). Dept. of Materials Sciences
• OSTI ID: 6886076
• Report Number(s): AD-A-198375/8/XAB; SWRI-8578/5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CAVITATION
CAVITIES
CERAMICS
CRACK PROPAGATION
CRACKS
CREEP
CRYSTAL STRUCTURE
DAMAGE
DOCUMENT TYPES
FAILURES
GRAIN BOUNDARIES
HIGH TEMPERATURE
KINETICS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUCLEATION
PROGRESS REPORT
SURFACE PROPERTIES
TENSILE PROPERTIES