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Comparison of different metal matrix systems for diamond tools fabricated by new current induced short-time sintering processes

: Tillmann, W.; Kronholz, C.; Ferreira, M.; Knote, A.; Theisen, W.; Schütte, P.; Schmidt, J.

European Powder Metallurgy Association -EPMA-:
World Powder Metallurgy Congress & Exhibition, PM 2010. Proceedings. Vol.3: Sintered steels (PM low alloyed steels, PM stainless steels), PM tool materials (hard materials & diamond tools, PM tool steels) : 10th - 14th October 2010, Fortezza da Basso Centre, Florence
Stockholm: EPMA, 2010
ISBN: 978-1-899072-12-5
Powder Metallurgy World Congress & Exhibition (PM) <2010, Florence>
Fraunhofer IFAM, Institutsteil Pulvermetallurgie und Verbundwerkstoffe Dresden ()

The new current induced sintering techniques like Spark Plasma Sintering (SPS) and Spark Plasma Consolidation (SPC) offer the possibility to fabricate diamond tools for the machining of mineral materials and concrete within a process time of several minutes down to a few milliseconds. First efforts in the fast sintering process of steel-copper diamond composites showed a very good compactibility of the powders.
In this paper the sintering behavior (SPS and SPC) of new alternative metal matrix components in combination with coated diamonds shall be analyzed. In this case it is the intention to vary the grain size of the metal powder to increase the sintering activity. To achieve the formation of a chemical bonding between diamond and metal within shorter process times, the usage of a carbide-forming metal coating on the diamonds, especially in combination with a non-reactive metal matrix should be enforced.