Fracture Mechanism Maps for Advanced Structural Ceramics. Part 1. Methodology and Hot-Pressed Silicon Nitride Results
Abstract
The static fatigue behavior of advanced structural ceramics can be controlled by a variety of failure mechanisms. A fracture mechanism map can define the stress-temperature regimes where the different mechanisms are dominant. The static fatigue resistance of a hot-pressed silicon nitride with magnesia sintering aid is limited by slow crack growth or creep fracture, depending upon the specific stress-temperature conditions. The flexural fracture map is considerably refined relative to earlier versions, and in conjunction with available tension data, was used to create a tension fracture map. The fracture map brings together the findings of a number of studies and can be appreciated by materials scientists and engineers. (jg)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1990
- Accession Number
- ADA220428
Entities
People
- George D. Quinn