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Fabrication of Silicon Nitride Ceramics by Microwave Heating

  • T. N. Tiegs
  • J. O. Kiggans
Chapter

Abstract

Microwave processing of silicon nitride-based ceramics is currently being examined to identify aspects that may accelerate densification or produce unique microstructures. Because the microwaves preferentially couple with the sintering additives and the intergranular phases, relatively high additive contents are required to produce samples that will densify and are crack-free. Improved densification of green powder compacts and enhanced weight losses are observed during microwave heating.

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References

  1. 1.
    Tennery, V.J., Ceramics in Engines-An International Status Report, Am. Ceram. Soc. Bull., 1989,68[2], 362–365Google Scholar
  2. 2.
    Lange, F.F., Volatilization Associated with the Sintering of Polyphase Si3N4 Materials, J. Am. Ceram. Soc., 65[8], 1982, C–120–C–121.Google Scholar
  3. 3.
    Sutton, W.H., Microwave Processing of Ceramic Materials, Am. Ceram. Soc. Bull., 1989, 68[2], 376–386.Google Scholar
  4. 4.
    Binner, J.G.P., Microwave Processing of Ceramics, Brit. Ceram. Proc., 1990, 45, 97–108.Google Scholar
  5. 5.
    Clarke, D.R. and Ho, W.W., Effect of Intergranular Phases on the High-Frequency Dielectric Losses of Silicon Nitride Ceramics. In Additives and Interfaces in Electronic Ceramics, Advances in Ceramics. Vol. 7, ed. M.F. Yan and A.H. Heuer, Amer. Ceram. Soc., Westerville, OH, 1983, pp. 246–252.Google Scholar
  6. 6.
    Ho, W.W., High-Temperature Dielectric Properties of Polycrystalline Ceramics. In Microwave Processing of Materials. Vol. 124, eds. W.H. Sutton, M.H. Brooks, and I.I. Chabinsky, Materials Research Society, Pittsburgh, PA, 1988, pp. 137–148.Google Scholar
  7. 7.
    Ohno, H. and Katano, Y., Electrical Properties of Silicon Nitride. In Mater. Sci. Forum. Vol. 47. 1989, pp. 215–227.CrossRefGoogle Scholar
  8. 8.
    Tiegs, T.N., Kiggans, J.O., and Kimrey, H.D., Microwave Processing of Silicon Nitride. In Microwave Processing of Materials-II. Vol. 189. ed. by W.B. Snyder, W.H. Sutton, D.L. Johnson, and M.F. Iskander, Materials Research Soc., Pittsburgh, PA 1991.Google Scholar
  9. 9.
    Tiegs, T.N., Kiggans, J.O., and Kimrey, H.D., Microwave Sintering of Silicon Nitride, to be published in Ceram. Eng. Proc.. [9–10], 1991.Google Scholar
  10. 10.
    Ferber, M.K., Tiegs, T.N., and Jenkins, M.G., Effect of Post-Sintering Microwave Treatments Upon the Mechanical Performance of Silicon Nitride, to be published in Ceram. Eng. Proc., [9–10], 1991.Google Scholar
  11. 11.
    Janney, M.A. and Kimrey, H.D., Diffusion-Controlled Processes in Microwave-Fired Oxide Ceramics. In Microwave Processing of Materials-II, Vol. 189, ed. by W.B. Snyder, W.H. Sutton, D.L. Johnson, and M.F. Iskander, Materials Research Soc., Pittsburgh, PA, 1991.Google Scholar
  12. 12.
    Antona, P.L., Giachello, A., and Martinengo, P.C., Nitridation of Silicon in Presence of Oxides. In Ceramic Powders, ed. P. Vincenzini, Elsevier Sci. Pub., Amsterdam, 1983, pp. 753–766.Google Scholar
  13. 13.
    Kiggans, J. O., Hubbard, C.R., Steele, R.R., Kimrey, H.D., Holcombe, C.E., and Tiegs, T.N., Characterization of Silicon Nitride Synthesized by Microwave Heating, to be published in Ceramic Transactions. Microwaves: Theory and Application in Materials Processing, ed. D.E. Clark, F.D. Gac, and W.H. Sutton, American Ceramic Society, Westerville, OH, 1988.Google Scholar
  14. 14.
    Lewis, M.H., Leng-Ward, G. and Jasper, C., Sintering Additive Chemistry in Controlling Properties of Nitride Ceramics. In Ceramic Transactions, Ceramic Powder Science, II, B., ed. G.L. Messing, E.R. Fuller, Jr., and H. Hausner, American Ceramic Society, Westerville, OH, 1988, pp. 1019–1033.Google Scholar
  15. 15.
    Hirosaki, N. and Okada, A., Change in Oxygen Content of Y2O3-Nd2O3-Doped Silicon Nitride During Firing, J. Am. Ceram. Soc., 72[12], 1989, 2359–2360.CrossRefGoogle Scholar
  16. 16.
    Pompe, R. and Carlsson, R., Sintering of Si3N4-Based Materials Using the Powder Bed Method. In Process in Nitrogn Ceramics, ed. F.L. Riley,Martinus Nijhoff Pub., Netherlands, 1983, pp. 219–224.CrossRefGoogle Scholar
  17. 17.
    Tiegs, T.N., Ferber, M.K., Kiggans, J.O., More, K.L., Hubbard, C.M., and Coffey, D.W., Microstructure Development During Microwave Annealing of Dense Silicon Nitride, to be published in Ceramic Transactions. Microwaves: Theory and Application in Materials Processing, ed. D.E. Clark, F.D. Gac, and W.H. Sutton, American Ceramic Society, Westerville, OH, 1Google Scholar
  18. 18.
    Johnson, D.L., Microwave Heating of Grain Boundaries in Ceramics, J. Am. Ceram. Soc., 74[4], 1991, 849–850.CrossRefGoogle Scholar

Copyright information

© Elsevier Science Publishers Ltd and MPA Stuttgart 1992

Authors and Affiliations

  • T. N. Tiegs
    • 1
  • J. O. Kiggans
    • 1
  1. 1.Oak Ridge National LaboratoryOak RidgeUSA

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