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Burner Rig Thermal Fatigue Failure of SiC Continuous Fiber/Si3N4 Ceramic Composites

Published online by Cambridge University Press:  15 February 2011

T. Ertürk ,
K. Park  and
C. Sung
T. Ertürk
Affiliation:
Department of Chemical and Nuclear Engineering, and University of Massachusetts, Lowell, MA 01854
K. Park
Affiliation:
Center for Advanced MaterialsUniversity of Massachusetts, Lowell, MA 01854
C. Sung
Affiliation:
Center for Advanced MaterialsUniversity of Massachusetts, Lowell, MA 01854
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Abstract

The burner rig thermal fatigue properties of SiC continuous fiber/Si3N4 ceramic composites were examined under impinged jet fuel flame, a constant applied tensile stress and thermal cycling in the temperature range 500-1350 °C. The SCS-9 SiC fiber/Si3N4 composites failed within the flame impinged zone, whereas the SCS-6 fiber/Si3N4 composites failed outside the flame impinged zone due to the high thermal stresses resulting from high-temperature gradients. Analytical transmission electron microscopy was used to investigate the microstructure and chemistry of the fiber, matrix and fiber/matrix interface in the failed SCS-9 SiC fiber/Si3N4 composites. The partial degradation of columnar structure of the fiber was interpreted as the dominant mechanism of burner rig thermal fatigue failure of SCS-9 SiC fiber/Si3N4 composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 449
Copyright
Copyright © Materials Research Society 1995

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References

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