Strength Behaviour of a Gas Pressure Sintered Siliconnitride (GPSSN) under Static and Cyclostatic Loading at 1250°C in Air
The strength of ceramic materials shows commonly a great scatter. If the material exhibits distinct subcritical crack growth additionally a great scatter in lifetime occurs at least under tensile loading. Gas pressure sintered siliconnitride is expected to show a less distinct fatigue behaviour as sintered Siliconnitride. Therefore, experimental investigations under dynamic, static and cyclostatic loading with 4-point bending specimens at 1250°C in air were performed.
KeywordsBoron Nitride Fatigue Behaviour Stress Rate Strength Distribution Subcritical Crack Growth
Unable to display preview. Download preview PDF.
- 1.A.G. Evans, E.R. Fuller, Crack Propagation in Ceramic Materials Under Cyclic Loading Conditions, Met. Trans, 5, 27 - 33 (1974).Google Scholar
- 2.S. Lauf, Ph. D. Thesis, University of Stuttgart, Germany, (1986).Google Scholar
- 3.S. Lauf, R.F. Pabst, Fatigue Behaviour of SiSiC Composite Structures at Elevated Temperatures, in: Proc. Europ. Mech. Colloquium 204, Structure and Crack Propagation in Brittle Matrix Composite Materials, Jablonna, Poland, 11, 151 - 67 (1985).Google Scholar
- 4.S. Lauf, A. Bonnhauser, R.F. Pabst, A comparison of measured and computed Cyclodynamic Fatigue Failure Times of SiC at Room and Elevated Temperatures, Proc. 4th E.C.F. Conference, Leoben, Austria, Sept. (1982).Google Scholar
- 5.D. Munz, T. Fett, Mechanisches Verhalten keramischer Werkstoffe, WFT 8, Springer-Verlag (1989).Google Scholar