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Microwave Reaction Sintering of Tungsten Carbide Cobalt Hardmetals

Published online by Cambridge University Press:  10 February 2011

T. Gerdes ,
M. Willert-Porada ,
K. Rödiger  and
K. Dreyer
T. Gerdes
Affiliation:
University of Dortmund, Dept. Chem. Eng., Dortmund, FRG
M. Willert-Porada
Affiliation:
University of Dortmund, Dept. Chem. Eng., Dortmund, FRG
K. Rödiger
Affiliation:
WIDIA GmbH, Essen, FRG
K. Dreyer
Affiliation:
WIDIA GmbH, Essen, FRG
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Abstract

Microwave reaction sintering of tungsten- carbon-, cobalt mixtures is described as a method that combines the liquid phase reaction sintering of tungsten carbide cobalt hardmetals with the enhanced densification behavior of hardmetals in the microwave field. Starting with green parts composed of W-, Co- powder, soot as carbon source and with varying amount of additives a dense and extremely fine grained hardmetal can be obtained in one pressureless microwave reaction sintering step.

By this method hardmetals with improved mechanical properties can be obtained in a drastically simplified processing cycle, without time consuming steps such as carburizing and milling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 175
Copyright
Copyright © Materials Research Society 1996

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References

1. Kolaska, H., Pulvennetallurgie der Hartmetalle, Fachverband Pulvennetallurgie, Hagen, 1992 Google Scholar
2. Pampuch, R., Lis, J., Stroierski, L., Self Propagating High-Temperature Synthesis of Ceramic Powders, Sci. of Ceramic 14, 1989, p. 14–26 Google Scholar
3. Merzhanov, A.G., Self Propagating High-Temperature Synthesis of Refractory Compounds, Moscow Vestnik Akademii Nauk SSSR, 10, p.76–84, 1976 Google Scholar
4. Adachi, S., Wada, T., Mihara, T.,High pressure self-combustion sintering of aluminatitanium carbide ceramic composition, J. Am. Ceram. Soc., 73, 5, p. 1442–1451, 1990 Google Scholar
5. Crider, J.F., Synthesis and densification of oxide-carbide composites, Ceram. Eng. Sci. Proc., 3 [9–10] p. 519–526, 1982 Google Scholar
6. Cutler, R.A., Virkar, A.V., Holt, J.B., Synthesis and densification of oxide-carbide composites, Ceram. Eng. Sci. Proc., 6 [7–8], p. 715–728, 1985 Google Scholar
7. Willert-Porada, M., Fischer, B., Gerdes, T., Application of Microwave Heating to Combustion Synthesis and Sintering of A12O3-TiC Ceramics, Ceram. Trans. 36, p. 365–375, 1993 Google Scholar
8. Gerdes, T., Willert-Porada, M., Microwave Sintering of Metal-Ceramic and Ceramic-Ceramic Composites, MRS Symp. Proc. Vol.347, p. 531–537, 1994 Google Scholar
9. Gerdes, T., Willert-Porada, M., Kolaska, H., Rödiger, K., Guidelines for Large Scale MW-Processing of Hardmetals, Ceram. Trans. 59, p. 423–431, 1995 Google Scholar
10. Gerdes, T., Willert-Porada, M., Rödiger, K., Microwave Sintering of Tungsten Carbide Cobalt Hardmetals, MRS Proceedings, 1996 Google Scholar