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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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