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Transient effects in creep cavity nucleation and early growth in ceramics

Conference ·
OSTI ID:6336953
;
Creep fracture of ceramic materials frequently occurs by the nucleation, growth, and coalescence of grain boundary cavities. Results of recent experimental studies of cavitation kinetics in compression crept ceramics are presented to illustrate the transient nature of cavity nucleation and early growth. The transient character of cavitation arises primarily due to the dependence of both cavity nucleation and early cavity growth on the stochastic process of grain boundary sliding. Possible mechanisms for the observed transient behavior will be presented and implications discussed. 45 refs., 4 figs.
Research Organization:
Southwest Research Inst., San Antonio, TX (USA)
DOE Contract Number:
FG05-84ER45063
OSTI ID:
6336953
Report Number(s):
CONF-890310-5; ON: DE89010420
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CAVITATION
CAVITIES
CERAMICS
COMPRESSION
CREEP
CRYSTAL STRUCTURE
FAILURES
FRACTURES
GRAIN BOUNDARIES
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUCLEATION
STRESS ANALYSIS