Hostname: page-component-77c89778f8-m42fx Total loading time: 0 Render date: 2024-07-22T13:35:37.592Z Has data issue: false hasContentIssue false
  • English
  • Français

Al2O3 fiber strength degradation in metal and intermetallic matrix composites

Published online by Cambridge University Press:  03 March 2011

S.L. Draper  and
I.E. Locci
S.L. Draper
Affiliation:
NASA Lewis Research Center, Materials Division, 21000 Brookpark Road, Cleveland, Ohio 44135
I.E. Locci
Affiliation:
NASA Lewis Research Center, Materials Division, 21000 Brookpark Road, Cleveland, Ohio 44135 and Department of Materials Science and Engineering, Cleveland, Ohio 44106
Get access

Abstract

The mechanisms for fiber damage in single crystal Al2O3 fiber-reinforced composites were investigated. Both fiber fragmentation and fiber strength degradation were observed in composites with a variety of matrix compositions. Four mechanisms that may be contributing to the fiber strength loss have been proposed and include matrix reaction, reaction with binders, residual stress-induced damage, and pressure from hot pressing. The effect of matrix reaction was separated from the other three effects by sputter-coating the matrices on cleaned fibers and annealing with a temperature profile that simulates processing conditions. These experiments revealed that Y and Cr in FeCrAlY base alloys and Zr in NiAl alloys reacted with the fiber, and grooves and adherent particles were formed on the fiber surface which were responsible for the strength loss. The effects of the matrix reaction appeared to dominate over the other possible mechanisms, although evidence for reaction with binders was also found. Ridges on the fiber surface, which reflected the grain boundaries of the matrix, were also observed. In order for single-crystal Al2O3 to be used as a fiber in MMC's and IMC's, a matrix or protective coating which minimizes matrix reaction during processing will be necessary. Of the matrices investigated, the Thermo-spanTM alloy was the least damaging to fiber properties.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 6 , June 1994 , pp. 1397 - 1411
Copyright
Copyright © Materials Research Society 1994

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

REFERENCES

1Draper, S. L., Gaydosh, D. J., and Chulya, A., in HITEMP Review 1991, NASA CP-10082 (Lewis Research Center, Cleveland, OH, 1991), pp. 42-1 to 42-14.Google Scholar
2Bowman, R. R., in HITEMP Review 1992, NASA CP-10104 (Lewis Research Center, Cleveland, OH, 1992), pp. 38-1 to 38-15.Google Scholar
3Misra, A. K., Metall. Trans. 21A, 441 (1990).CrossRefGoogle Scholar
4Misra, A. K., in NASA CR-4171 (Lewis Research Center, Cleveland, OH, 1988).Google Scholar
5Pickens, J. W., Noebe, R. D., Watson, G. K., Brindley, P. K., and Draper, S. L., NASA TM-102060 (1989).Google Scholar
6Draper, S. L., Locci, I. E., and Eldridge, J. I., in HITEMP Review 1992, NASA CP-10104 (Lewis Research Center, Cleveland, OH, 1992), pp. 17-1 to 17-13.Google Scholar
7Trumbauer, E. R., Hellmann, J. R., Shelleman, D. L., and Koss, D. A., in HITEMP Review 1992, NASA CP-10104 (Lewis Research Center, Cleveland, OH, 1992), pp. 16-1 to 16-15.Google Scholar
8Bowman, R. R., Misra, A. K., and Arnold, S. M., (unpublished).Google Scholar
9Sayir, A., presented at 15th Annual Conference on Composites and Adv. Ceramics, Cocoa Beach, FL (1991).Google Scholar
10Bowman, R. R., in Intermetailic Matrix Composites II, edited by Miracle, D. B., Anton, D. L., and Graves, J. A. (Mater. Res. Soc. Symp. Proc. 273, Pittsburgh, PA, 1992), pp. 145–155.Google Scholar
11Jaskowiak, M. H., private communication (1992).Google Scholar
12Hurley, G. F., Applied Polymer Symposia, No. 21, edited by Preston, J. and Economy, J. (John Wiley & Sons, Easton, PA, 1973), pp. 121–130.Google Scholar
13Mehan, R. L., Metall. Trans. 3, 90 (1972).CrossRefGoogle Scholar
14Westfall, L. J., NASA TM-X-3333 (Lewis Research Center, Cleveland, OH, 1976).Google Scholar
15Jaskowiak, M. H., Philipp, W. H., Eldridge, J. I., and Setlock, J. A., in HITEMP Review 1992, NASA CP-10104 (Lewis Research Center, Cleveland, OH, 1992).Google Scholar
16Misra, A. K., Crandall, K., and Bowman, R., in HITEMP Review 1992, NASA CP-10104 (Lewis Research Center, Cleveland, OH, 1992), pp. 39-1 to 39-15.Google Scholar
17Tressler, R. E., in Composite Materials, Interfaces in Metal Matrix Composites, edited by Metcalfe, A. G. (Academic Press, New York and London, 1974), Vol. 1, pp. 285–328.Google Scholar
18Lynch, C. T. and Burte, H. M., Metal Matrix Composites, ASTM STP438 (Am. Soc. Test. Mater., Philadelphia, PA, 1968), pp. 3–25.Google Scholar
19Mehan, R. L. and Noone, M. J., in Composite Materials, Metallic Matrix Composites, edited by Kreider, K. G. (Academic Press, New York and London, 1974), Vol. 4, pp. 159–227.Google Scholar
20Sutton, W. H. and Feingold, E., Mater. Sci. Res. 3, 577 (1966).Google Scholar
21Shewmon, P. G., Diffusion in Solids (McGraw-Hill Book Company, New York, 1963), p. 179.Google Scholar
22Mullins, W. W., J. Appl. Phys. 28 (3), 333–339 (1957).CrossRefGoogle Scholar
23Reimanis, I. E., Acta Metall. Mater. 40, Suppl., S67–S74 (1992).CrossRefGoogle Scholar
24Ochiai, S. and Murakami, Y., Metall. Trans. 12A, 1155–1161 (1981).CrossRefGoogle Scholar
25Ochiai, S. and Osamura, K., Metall. Trans. 19A, 1499–1506 (1988).CrossRefGoogle Scholar
26Iwasa, M. and Bradt, R. C., in Structure and Properties ofMgO and Al2O3 Ceramics, Advances in Ceramics, edited by Kingery, W. D. (The American Ceramic Society, Inc., Westerville, OH, 1983), Vol. 10, pp. 767–779.Google Scholar