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Residual Strains in Al2O3/SiC (Whisker) Composite from 25-1000°C

Published online by Cambridge University Press:  06 March 2019

Benjamin Ballard ,
Paul Predecki  and
Camden Hubbard
Benjamin Ballard
Affiliation:
Engineering Department, University of Denver, Denver, CO
Paul Predecki
Affiliation:
Engineering Department, University of Denver, Denver, CO
Camden Hubbard
Affiliation:
HTML, Oak Ridge National Laboratory, Oak Ridge, TN
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Abstract

Residual strains in a hot-pressed α-Al2O3/25 wt % β-SiC (whisker) composite were determined at temperatures from 25 to 1000°C in 250°C increments. The data collected from the (146) reflections of Al2O3 and the (511+333) reflections of SiC whiskers indicates that residual strains in both phases decrease linearly with temperature; the composite's extrapolated zero-strain temperature is determined to be 1471°C and comparable to the value ~1350 °C obtained by Majumdar et al. from neutron data. The lattice thermal expansion of the whiskers agrees well with literature, data for the monolithic β-SiC form.

Type
IX. Nonambient Application of Diffraction
Information
Advances in X-Ray Analysis , Volume 34: Thirty-Ninth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1990 , 1990 , pp. 465 - 471
Copyright
Copyright © International Centre for Diffraction Data 1990

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References

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