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Mechanica and Physical Properties of Microwave Sintered Si3N4

Published online by Cambridge University Press:  25 February 2011

M.C.L. Patterson ,
P.S. Apte ,
R.M. Kimber  and
R. Roy
M.C.L. Patterson
Affiliation:
Alcan International Umited, Kingston Research and Development Centre, P.O. Box 8400, Kingston. Ontario, CanadaK7L 5L9
P.S. Apte
Affiliation:
Alcan International Umited, Kingston Research and Development Centre, P.O. Box 8400, Kingston. Ontario, CanadaK7L 5L9
R.M. Kimber
Affiliation:
Alcan International Umited, Kingston Research and Development Centre, P.O. Box 8400, Kingston. Ontario, CanadaK7L 5L9
R. Roy
Affiliation:
Alcan International Umited, Kingston Research and Development Centre, P.O. Box 8400, Kingston. Ontario, CanadaK7L 5L9
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Abstract

Microwave energy at 2.45 GHz has been used to sinter silicon nitride in times of between 30 and 120 minutes to form a dense product with an average grain size of 0.35 μm and substantially improved uniformity of properties over all commercial silicon nitrides and sialons investigated.

A comparison between microwave and conventionally sintered parts of the same density showed the average mechanical properties to be the same for both sintering techniques, but revealed an improvement in the uniformity of mechanical properties of the microwave sintered products.

Silicon nitride components with 5% Al2O3 and 5% Y2O3 as sintering aids, has been sintered to a density of approximately 97% of theoretical. Hipping of these components at 1800 °C for 60 minutes, resulted in the complete removal of residual porosity. Dense components were evaluated in machining tests against commercial ceramic cutting tools. The results show a reduction in wear rate of batter than 10% for microwave sintered Sl3N4 in turning and milling operations on cast iron at a cutting speed of 2000 surface feet per minute.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 269: Symposium L – Microwave Processing of Materials III , 1992 , 301
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Nighe, J., J. Mater. Sci. 13, pp. 1455, (1978).Google Scholar
2. Lange, F., Int. Metals. Rev., 1, pp. 247, (1980).Google Scholar
3. Lange, F, and Davies, B.I., J. Am. Cer. Soc., 62, pp. 629, (1979).Google Scholar
4. Ekstrom, T, and Nygren, M., J. Am. Ceram. Soc., 75, 2, pp. 259–276. (1992).CrossRefGoogle Scholar
5. Stutz, D., Greil, P., and Petzow, G., J. Mater. Sci. Lett., 5, pp. 335–336, (1986).CrossRefGoogle Scholar
6. Ekstrom, T., Mater. Sci. Eng., A109, pp. 341–349, (1989).Google Scholar
7. Ekstrom, T., and Persson, J., J. Am. Ceram. Soc., 73, 10, pp. 2834–2838, (1990).Google Scholar
8. Oyama, Y., and Kamigaito, O., Japan J. Appl. Phys. 1. pp. 1637–1642, (1971).Google Scholar
9. Jack, K.H., and Wilson, W.I., Nature Phys. Sci. (London) 2 pp. 28–29, (1972).CrossRefGoogle Scholar
10. Jack, K.H., J.Mater.Sci., 1L. pp. 1135–1158, (1976).CrossRefGoogle Scholar
11. Patterson, M.C.L., Kimber, R.M., and Aptd, P.S., in Microwave Proceeding of Materials II, edited by Snyder, W.B., Sutton, W.H., Iskander, M.F. and Johnson, D. Lynn. (Mater. Res. Soc. Proc., 189, Pittsburgh, PA, 1990), pp. 257–266.Google Scholar
12. Apté, P.S., Kimber, R.M., and Patterson, M.C.L., Structural Ceramics, (Proc. 11th Risø Int. Symp. Met. Mat. Sci., Denmark, Sept 11th, 1990), pp. 167–174.Google Scholar
13. Tiegs, T. N, Ferber, M. K, Kiggans, J. O, More, K. L, Hubbard, C. M, and Coffey, D. W, in Ceramic Transactions. Microwaves: Thoery and Application in Materials Processing. Vol 21, Edited by Clark, E.D., Gac, F.D. and Sutton, W.H., (Am. Cer. Soc., Westerville, OH, 1991), pp. 411–420.Google Scholar
14. Tiegs, T.N., Kiggans, J.O. Jr, and Kimrey, H.D Jr, in Microwave Processing of Materials II, edited by Snyder, W.B., Sutton, W.H., Iskander, M.F. and Johnson, D. Lynn, (Mater. Res. Soc. Proc., 189, Pittsburgh, PA, 1990), pp. 267–272.Google Scholar
15. Patterson, M.C.L., Apte, P.S., Kimber, R.M., and Roy, R., “Batch Process for Microwave Sintering of Si3N4”, this proceedings.Google Scholar
16. Patterson, M.C.L., Roy, R.V., Kimber, R.M., and Apte, P.S., Filed Patent but not Published, PCT.CA92/00031.Google Scholar
17. Evans, A.G., and Charles, E.A., J. Am. Cer. Soc., 11, pp. 371, (1976).Google Scholar
18. Ponton, C.B., and Rawlings, R.D., Mater. Sci. Tech. 1 pp. 865–872, (Sept 1989).CrossRefGoogle Scholar
19. Patterson, M.C.L., Apte, P.S, Kimber, R.M. and Roy, R., Int. Conf. on Microwaves and High Frequencies, (Comite Francais De L'Electricite, Nice, 8-10 October, 1991), pp. 33–36.Google Scholar