Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-27T00:25:03.205Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Predecki, P., Abuhasan, A., and Barrett, C. S., Adv. in X-Ray Analy, 31, 231 (1988).Google Scholar
2 Abuhasan, A. and Predecki, P., Adv. in X-Ray Analy, 32, 471 (1989).Google Scholar
3 Abuhasan, A., Balasingh, C., and Predecki, P., J. Am. Ceram. Soc., 73, 8, 858 (1990).Google Scholar
4 Majumdar, S., Kupperman, D., and Singh, J., J. Am. Ceram. Soc, 71, 10, 858 (1989).Google Scholar
5 Majumdar, S. and Kupperman, D., J. Am. Ceram. Soc., 72, 2, 312 (1989).Google Scholar
6 Cohen, J. B., Dolle, H. and James, M. R., National Bureau of Standards Special Publication 567. Preceedings of Symposium on Accuracy in Powder Diffraction held at NBS, Gaithersburg, MD, June 11-15, 1979.Google Scholar
7 Predecki, P., Abuhasan, A. and Barrett, C. S., “X-ray Elastic Constants for β-SiC and Residual Stress Anisotropy in a Hot-pressed Al2O3/SiC (whisker) Composite”. Paper In This Proceedings.Google Scholar
8 Hsueh, C. H., Becher, P. F., and Angelini, P., J. Am. Ceram. Soc., 71, 11, 929 (1988).Google Scholar
9 Li, Z. and Bradt, R. C., J. Mater. Sc., 22, 2557, (1987)Google Scholar