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Microwave Sintering of Zirconia-Toughened Alumina Composites*

Published online by Cambridge University Press:  28 February 2011

H. D. Kimrey ,
J. O. Kiggans ,
M. A. Janney  and
R. L. Beatty
H. D. Kimrey
Affiliation:
Oak Ridge National Laboratory Oak Ridge, Tennessee
J. O. Kiggans
Affiliation:
Oak Ridge National Laboratory Oak Ridge, Tennessee
M. A. Janney
Affiliation:
Oak Ridge National Laboratory Oak Ridge, Tennessee
R. L. Beatty
Affiliation:
Oak Ridge National Laboratory Oak Ridge, Tennessee
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Abstract

Microwave sintering possesses unique attributes and has the potential to be developed asa new technique for controlling microstructure to improve the properties of advanced ceramics. 1–6 Because microwave radiation penetrates most ceramics, uniform volumetric heating is possible. Thermal gradients, which are produced during conventional sintering because of conductive and radiative heat transfer to and within the part, can be minimized. By eliminating temperature gradients, it is possible to reduce internal stresses, which contribute to cracking of parts during sintering, and to create a more uniform microstructure, which may lead to improved mechanical properties and reliability. With uniform, volumetric temperatures, the generation of nonuniform particle/grain growth due to temperature gradients and associated sintering gradients can be regulated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 189: Symposium L – Microwave Processing of Materials II , 1990 , 243
Copyright
Copyright © Materials Research Society 1991

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Footnotes

*

Research sponsored by the U.S. Department of Energy Assistant Secretary of Conservation and Renewable Energy, Office of Industrial Technologies, Advanced Industrial Materials Program under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.

References

REFERENCES

1. Kimrey, H. D., Janney, M. A., and Becher, P. F., “Techniques for Ceramic Sintering Using Microwave Energy,” Conference Digest, 12th International Conf. on Infrared and Millimeter Waves, Orlando, FL, December 1987.Google Scholar
2. Janney, M. A. and Kimrey, H. D., “Microwave Sintering of Alumina at 28 GHz,” Ceramic Powder Science, II, pp. 919–924, Messing, G. L., Fuller, E.R., and Hausner, H., eds., Am. Ceramic Soc., Westerville, OH, 1988.Google Scholar
3. Janney, M. A. and Kimrey, H. D., “Microstructure Evolution in Microwave Sintered Alumina,” to be published in Advances in Sintering, Am. Ceramic Soc., Fall 1989.Google Scholar
4. Tian, Y. L., Johnson, D. L., and Brodwin, M. E., “Ultrafine Microstructure of AL2O3 Produced by Microwave Sintering,” Ceramic Powder Science, II, pp. 925–32, Messing, G.L., Fuller, E.R., and Hausner, H., eds., Am. Ceramic Soc., Westerville, OH, 1988.Google Scholar
5. Holcombe, C. E., “Microwave Sintering of Non-Oxide Ceramics,” presented at the 91st Annual Meeting of the American Ceramic Society, Indianapolis, IN, April 1989.Google Scholar
6. Schmidt, M. A., Janney, M. A., and Mayotte, J. R., “SEM Image Analysis of Grain Growth in Microwave-Annealed Alumina,” Microstructural Science, Vol. 18, Proc. 22nd IMS Meeting, Charlotte NC, July 1989, IMS and ASM International, in press.Google Scholar
7. Garvie, R. C. and R. Hannink, H. J., “Ceramic Steel?,” Nature (London), 258 [5337] 703–704 (1975).Google Scholar
8. Claussen, N., “Fracture Toughness of AL2O3 with an Unstabilized ZrO2 Dispersed Phase,” J. Am. Ceram. Soc. 59 [1–2] 49–51 (1976).Google Scholar
9. Porter, D. L. and Heuer, A. H., “Mechanisms of Toughening Partially Stabilized Zirconia (PSZ),” J. Am. Ceram. Soc. 60 [3–4] 183–84 (1977).Google Scholar