Hostname: page-component-54dcc4c588-trf7k Total loading time: 0 Render date: 2025-09-20T16:38:50.135Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation of Coatings for Sapphire Fibers in TiAl Using the Fiber Push-Out Test

Published online by Cambridge University Press:  15 February 2011

T. J. Mackin  and
J. Yang
T. J. Mackin
Affiliation:
Materials Department, The University of California at Santa Barbara, Santa Barbara, CA 93106
J. Yang
Affiliation:
Materials Department, The University of California at Santa Barbara, Santa Barbara, CA 93106
Get access

Abstract

Fiber push-out tests were used to evaluate several double coating systems for sapphire fibers in γ -TiAl. The double coatings consisted of an inner debond coating, followed by an outer coating of alumina that serves as a diffusion barrier. The inner coatings were of three types: carbon black, colloidal graphite and porous alumina. By comparing estimates of interface toughness computed from the push-out tests, each double coating is found to permit debonding and sliding of the sapphire fibers. Consequently, each of the double coatings would afford improved fracture toughness for sapphire reinforced γ -TiAl.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 343
Copyright
Copyright © Materials Research Society 1992

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.)

Article purchase

Temporarily unavailable

References

REFERENCES

1. Evans, A. G., Zok, F. W. and Davis, J., Composites Science and Technology, 42, 3–24, (1991).Google Scholar
2. Kerans, R. J., Hay, R. S., Pagano, N. J. and Parasarathay, T. A., Cer Bull, Vol.68, No. 2, (1989).Google Scholar
3. Curtin, W., J. Am. Cer. Soc., 74(11), 2837 (1991).Google Scholar
4. Ochai, S. and Osamura, K., Met Trans 21A, 971 (1991).Google Scholar
5. He, M-Y and Hutchinson, J. W., Int J. Solids Structures Vol.25, No. 9, pp 1053–1067 (1989).Google Scholar
6. Mackin, T. J., Yang, J. Y. and Warren, P. D., submitted to the J. Amer. Cer. Soc., April (1992).Google Scholar
7. Warren, P. D., Mackin, T. J. and Evans, A. G., Acta metall. mater. Vol.40, No. 6 pp 1243–1249 (1992).Google Scholar
8. Liang, C. and Hutchinson, J. W., to be published.Google Scholar
9. Mackin, T. J., Warren, P. D. and Evans, A. G., Acta metall. mater. Vol.40, No. 6 pp 1251–1257 (1992).Google Scholar
10. Budiansky, B., Hutchinson, J. W. and Evans, A. G., J Mech Phys Solids, 2 167(1986).Google Scholar
11. Isawa, M. and Bradt, R. C., Structure and Properties of MgO and A1203 Ceramics, 767–779, ACS, Columbus OH.Google Scholar