Stress Corrosion of Ceramic Materials
Abstract
This report describes the results of an experimental program to investigate mechanisms of stress corrosion in glasses and ceramics and to determine effects of composition and microstructure on the fracture of piezoelectric materials. One of the main reasons for strength degradation of structural ceramic materials is stress corrosion cracking. Caused mainly by water in the environment, stress corrosion cracking results in subcritical crack growth that leads to delayed failure of ceramic materials. As a consequence of this crack growth, ceramic components that are subjected to external stresses are liable to fail after an indeterminate period of time, leading to a considerable uncertainty in the safe design stress. One of the objectives of modern ceramics technology is to reduce the uncertainty associated with structural design, and hence, to improve our capabilities of designing ceramic components that exhibit reliable mechanical behavior. This objective can be accomplished in part through a better understanding of the fundamental processes that occur during stress corrosion cracking.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1981
- Accession Number
- ADA108045
Entities
People
- K. Okazaki
- R. C. Pohanka
- S. Tashiro
- Stephen W. Freiman
- Terry A. Michalske
Organizations
- National Institute of Standards and Technology