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Residual Stresses in Al2O3/SiC (Whisker) Composites Containing Interfacial Carbon Films

Published online by Cambridge University Press:  06 March 2019

Alias Abuhasan  and
Paul K. Predecki
Alias Abuhasan
Affiliation:
Department of Engineering University of Denver Denver, CO 80208
Paul K. Predecki
Affiliation:
Department of Engineering University of Denver Denver, CO 80208
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Abstract

Residual strains and stresses were measured in hot-pressed α-Al2O3 composites containing 25 wt% β (cubic) SiC whiskers with and without a 50-100Å thick carbon coating. X-ray diffraction methods were used including the separation of macrostresses from the microstresses in the -Al2O3 and SiC phases by the method of Noyan and Cohen. The presence of the carbon coating on the whiskers reduced the magnitude of the residual microstresses in the whiskers by ˜13% and in the matrix by ˜10%. The measured residual stresses in the whiskers and the reduction due to the carbon film were in good agreement with calculations from recent models proposed by Hsueh, Becher and Angelini, and by Li and Bradt.

Type
VII. X-Ray Stress Analysis
Information
Advances in X-Ray Analysis , Volume 32: Thirty-Seventh Annual Conference on Applications of X-ray Analysis, August 1-5, 1988 , 1988 , pp. 471 - 479
Copyright
Copyright © International Centre for Diffraction Data 1988

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References

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