Structural Reliability of Brittle Materials at High Temperatures.
Annual rept. 1 Oct 83-30 Sep 84,
NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD INORGANIC MATERIALS DIV
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Work during the past year was conducted on yttria-doped hot-pressed silicon nitride, alpha-silicon carbide, and a glass-bonded aluminum oxide. The first two materials were selected for study because of their potential for high temperature structural application, whereas the latter material was selected as a model material to investigate the creep-rupture behavior of two phase ceramics. During the past year our work emphasized the microstructural analysis of these materials and the effect of microstructure on component lifetime. A study has also been started on the effect of microstructure on component lifetime. A study has also been started on the effect of temperature on the strength of a commercial grade of partially stabilized zirconium oxide. The brief summary presented below gives our major findings on each of these materials. Full papers for each study are included in this report. Author
- Ceramics, Refractories and Glass