Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-10T17:27:24.770Z Has data issue: false hasContentIssue false
  • English
  • Français

Mechanical properties of a 20 vol % SiC whisker-reinforced, yttria-stabilized, tetragonal zirconia composite at elevated temperatures

Published online by Cambridge University Press:  03 March 2011

S.E. Dougherty ,
T.G. Nieh ,
J. Wadsworth  and
Y. Akimune
S.E. Dougherty
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, L-350, Livermore, California 94551-9900
T.G. Nieh
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, L-350, Livermore, California 94551-9900
J. Wadsworth
Affiliation:
Lawrence Livermore National Laboratory, P.O. Box 808, L-350, Livermore, California 94551-9900
Y. Akimune
Affiliation:
Central Engineering Laboratories, Nissan Motor Co., Ltd., Yokosuka 237, Japan
Get access

Abstract

The high-temperature deformation behavior of a SiC whisker-reinforced, yttria-stabilized, tetragonal zirconia polycrystalline composite containing 20 vol % SiC whiskers (SiC/Y-TZP) has been investigated. Tensile tests were performed in vacuum at temperatures from 1450 °C to 1650 °C and at strain rates from 10−3 to 10−5 s−1. The material exhibits useful high-temperature engineering properties (e.g., ∼100 MPa and 16% elongation at T = 1550 °C and at a strain rate of ∼10−4 s−1). The stress exponent was determined to be n ≍ 2. Scanning electron microscopy was used to characterize the grain size and morphology of the composites, both before and after deformation. The grain size in the composite was initially fine, but coarsened at the test temperatures; both dynamic and static grain growth were observed. The morphology of ceramic reinforcements appears to affect strongly the plastic deformation properties of Y-TZP. A comparison is made between the properties of monolithic Y-TZP, 20 wt. % Al2O3 particulate-reinforced Y-TZP (Al2O3/Y-TZP), and SiC/Y-TZP composites.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 1 , January 1995 , pp. 113 - 118
Copyright
Copyright © Materials Research Society 1995

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

1Becher, P. F., Acta Metall. 34, 1885 (1986).CrossRefGoogle Scholar
2Guo, J-K., Mao, Z-Q., Bao, C-D., Wang, R-H., and Yan, D-S., J. Mater. Sci. 17, 3611 (1982).CrossRefGoogle Scholar
3Wei, G. C. and Becher, P. F., Am. Ceram. Bull. 64, 298 (1985).Google Scholar
4Brennan, J. J. and Prewo, K. M., J. Mater. Sci. 17, 2371 (1982).CrossRefGoogle Scholar
5Cornie, J. A., Chiang, Y-T., Uhlmann, D. R., Mortensen, A., and Collins, J. M., Am. Ceram. Soc. Bull. 65, 293 (1986).Google Scholar
6Chokshi, A. H. and Porter, J. R., J. Am. Ceram. Soc. 69, C-1944 (1986).CrossRefGoogle Scholar
7Lin, H. T. and Becher, P. F., J. Am. Ceram. Soc. 74, 1886 (1991).CrossRefGoogle Scholar
8Duclos, R. and Carmpon, J., Scripta Metall. 23, 1673 (1989).CrossRefGoogle Scholar
9Yoon, C. K. and Chen, I. W., J. Am. Ceram. Soc. 73, 1555 (1990).CrossRefGoogle Scholar
10Akimune, Y., Katano, Y., and Shichi, Y., Adv. Ceram. Mater. 3, 138 (1988).CrossRefGoogle Scholar
11Nieh, T. G. and Wadsworth, J., Acta Metall. Mater. 38, 1121 (1990).CrossRefGoogle Scholar
12Stevens, R., Zirconia and Zirconia Ceramics (Magnesium Elektron Ltd., Twickenham, U.K., 1986).Google Scholar
13Wadsworth, J. and Sherby, O. D., Prog. Mater. Sci. 25, 35 (1990).CrossRefGoogle Scholar
14Clauer, A. H. and Hansen, N., Acta Metall. 32, 269 (1984).CrossRefGoogle Scholar
15Wakai, F., Sakaguchi, S., and Matsuno, Y., Adv. Ceram. Mater. 1, 259 (1986).CrossRefGoogle Scholar
16Nieh, T. G. and Wadsworth, J., Acta Metall. Mater. 39, 3037 (1991).CrossRefGoogle Scholar
17Nieh, T. G. and Wadsworth, J., Scripta Metall. Mater. 24, 763 (1990).CrossRefGoogle Scholar
18Xue, L. A. and Chen, I. W., J. Am. Ceram. Soc. 73, 3518 (1990).CrossRefGoogle Scholar
19Wakai, F. and Kato, H., Adv. Ceram. Mater. 3, 71 (1988).CrossRefGoogle Scholar
20Kim, W. J., Wolfenstine, J., and Sherby, O. D., Acta Metall. Mater. 39, 199 (1991).CrossRefGoogle Scholar
21Chen, I-W. and Xue, L. A., J. Am. Ceram. Soc. 73, 2585 (1990).CrossRefGoogle Scholar
22Schissler, D. J., Chokshi, A. H., Nieh, T. G., and Wadsworth, J., Acta Metall. Mater. 39, 3227 (1991).CrossRefGoogle Scholar