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Thermal Fatigue Resistance of A Carbon-Carbon Composite

Published online by Cambridge University Press:  25 February 2011

Q.C. Gu ,
T.K. LepistÖ  and
P.O. Kettunen
Q.C. Gu
Affiliation:
Institute of Materials Science, Tampere University of Technology, P.O. Box 589, SF-33101 Tampere, Finland
T.K. LepistÖ
Affiliation:
Institute of Materials Science, Tampere University of Technology, P.O. Box 589, SF-33101 Tampere, Finland
P.O. Kettunen
Affiliation:
Institute of Materials Science, Tampere University of Technology, P.O. Box 589, SF-33101 Tampere, Finland
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Abstract

Thermal fatigue resistance of carbon-carbon composites with three different fiber surface treatments is studied in thermal cycles between 100 °C and 1,700 °C up to a number of cycles of 100 in free and restricted expansion conditions. The effects of thermal cycles were studied by SEM paying attention especially to structural damage and interfacial debonding between fibers and matrix. Bending tests subsequent to 10 thermal cycles were used to study the effect of thermal cycling on mechanical properties of the composites. The effect depends on the surface treatment of fibers prior to pyrolization. In some cases, the bending strength decreased due to the thermal cycling, whereas a suitable surface treatment minimized the damaging effect and increased the pseudo-ductility of the composite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 270: Symposium M – Novel Forms of Carbon , 1992 , 73
Copyright
Copyright © Materials Research Society 1992

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References

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