Skip to main content Accessibility help
×
Home

Plasma Assisted Microwave Sintering and Joining of Ceramics

  • M. Samandi (a1) and M. Doroudian (a1)

Abstract

Direct microwave sintering and joining of low temperature ceramics such as mullite have been extensively studied. However, it is recognised that microwave sintering and joining of high temperature oxide and non-oxide ceramics poses serious problems, primarily because of the difficulty of coupling microwave energy into these non-absorbing materials which make up the bulk of advanced ceramics. Attempts to overcome this problem by using indirect auxiliary heating or utilisation of intermediary or impure materials have been, by and large, unsatisfactory. Indeed, this fundamental physical barrier has seriously impaired the penetration of microwave heating in ceramic processing.

In order to overcome this seemingly insurmountable fundamental barrier, a radical approach is required. This has been recently achieved by using a Microwave Induced Plasma (MIP) whereby microwave energy is utilised in a hybrid fashion. In this method, a microwave plasma is used to rapidly heat the ceramic to temperatures at which it becomes absorbing. At this point, microwave radiation is directly coupled to the ceramic and the plasma is extinguished since energy is no longer available to ionise the gas and sustain a plasma. This hybrid approach circumvents the limitations of conventional microwave heating for sintering and joining of advanced materials. In this review paper the fundamentals of microwave/materials interaction and conventional approach to microwave heating of ceramics will be thoroughly discussed. In addition, the new hybrid heating developed by the authors will be described and the possibility of MIP-assisted sintering/joining of industrially important materials will be demonstrated.

Copyright

References

Hide All
1. Sutton, W.H., “Microwave Processing of MaterialsAm. Cer. Soc. Bull. 68 (2) 376386 (1989).
2. Janney, M. A. and Kimrey, H.D., “Microwave Sintering of Alumina at 28 GHz”, Ceramic Powder Science II. Messing, G.L., Fuller, E.R. Jr, and Hauser, H., eds., Am. Cer. Soc. Inc. Westerville. OH (1988).
3. Meek, T.T. and Blake, R.D., J. matl. Sci. Letts., 5, 270–74 (1986)
4. Clark, D.E., “Microwave Processing: Present status and Future Promise”, Ceramic Engineering and science proceedings, 19, 1814–24, (1993).
5. Sheppard, L.M., “Manufacturing of ceramics with Microwaves”, Am. Cer. Soc. Bull. 67 (10, 1656–61, (1988).
6. Ahmad, I., Chandler, G.T. and Clark, D.E. “Processing of Superconducting Ceramics using Microwave Energy”, in Microwave Processing of Materials, eds Sutton, W.H., Brooks, M. H. and Chabinsky, I.J., Mat. Res. Soc. symp. Proc, 124. 239–46, (1988).
7. Binner, J.G.P., British ceramic Proceedings 45 Fabrication Technology. Edited by Daridge, R. and Thompson, D.P.., Inst. of Ceramics, Shelton, (1990).
8. Patii, D.S. and Mutsuddy, B.C. “Microwave Sintering of Alumina Ceramics in a Single Mode Applicator”, in Microwave Processing of Materials, eds Sutton, W.H., Brooks, M. H. and Chabinsky, I.J., Mat. Res. Soc. symp. Proc, 124, 301309, (1988).
9. De, A.S., Ahmad, I., Whitnery, E.D. and Clark, D.E., Ceram. Engg. and Sci. Proc, II 9–10, 1743–53, (1990).
10. Holcombe, C.E. and Dykes, N.L., “Importance of casketing for Microwave Sintering of Materials”, J. Matl. Sci. Letts., Vol. 9, 425428, (1990).
11. Walters, D.G., Brodwin, M.E. and Kriegsman, G.A., “Dynamic temperature profiles for a uniformly illuminated planar surface”, Mat. Res. Soc. Symop. Proc. Vol. 124. Eds Sutton, W.H., Brooks, M.H. - 129, (1988).
12. Metaxas, A.C. and Meredith, R., “Industrial Microwave HeatingPeter Peregrinus, (1983).
13. Bennett, C.E.G., McKinnon, N.A., “Sintering in gas DischargesNature, 217, 1287– 88, (1968).
14. Bennett, C.E.G., McKinnon, N.A. “Glow Discharge Sintering of Alumina”, in Kinetics of Reactions in Ionic systems: edited by Gray, T.J. and Frechette, V.D., Plenum Press, New York,; pp 408412, (1969).
15. Kim, J. S. and Johnson, D. L., Am. Cer: Bull. Vol. 62. No. 5 (1983)
16. Cordone, L.G. and Martinsen, W.E., “Glow Discharge Apparatus for rapid sintering of Alumina”, J. Am. Ceram. Soc., 55 (7) 380, (1972).
17. Thomas, G., Freim, J. and Martinsen, W.E., “Rapid Sintering of U02 in a Glow DischargeTrans. Am. Nucl. Soc., 17, 177, (1973).
18. Johnson, D.L. and Rizzio, R.R., “Plasma sintering of β″ - Alumina,” Am. Ceram. Soc. Bull., 52, (4) pp 467–72, 1980.
19. Tian, Y. L., Brodwin, M. E., Dewan, H. S. and Johnson, D. L., “Microwave Sintering of Ceramics Under High Gas Pressure”, Mat. Res. Soc. Symop. Proc Vol. 124. Eds Sutton, W.H., Brooks, M.H., 213218, (1988).
20. Salsman, J. B. and Holdenfield, S. P., “A Unique application of A Microwave Induced Plasma For Materials Synthesis”, Mat. Res. Soc Symop. Proc. Vol. 124. Eds Sutton, W.H., Brooks, M.H., 2025, (1988).
21. Asmussen, J., Lin, H.H., Manring, B. and Fritz, R., “Single mode or controlled multimode microwave cavity applicator for precision materials processing”, Rev. Sci. Instrum. 58 (8): 14771486, (1987).
22. Meek, T.T. and Blake, R.D., “Ceramic-Glass-Metal Seal by Microwave Heating”, U.S. Patent No. 4529 856, July 16, (1985)
23. Palaith, D. and Silberglitt, R.Microwave Joining of CeramicsCeramic Bulletin, Vol. 68, No. 9, (1989).
24. Bertaud, A.J. and Badot, J. C., “High temperature Heading in Refractory Materials”, J. Microwave Power, II [43], 315320, (1976).
25. Fukushima, H. “Microwave heating of ceramics and its application to joining”, Mat. Res. Soc. Symop. Proc Vol. 124. Eds Sutton, W.H., Brooks, M.H., 267–72, (1988).

Related content

Powered by UNSILO

Plasma Assisted Microwave Sintering and Joining of Ceramics

  • M. Samandi (a1) and M. Doroudian (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.