Diamond metal composite

Abstract

The present invention relates to a method for producing diamond-metal composites including mixing diamond particles with metal-filler particles forming a diamond/metal-filler mixture, forming a green body of the diamond/metal-filler mixture, optionally green machining the green body to a work piece before or after pre-sintering by heating the green body to a temperature <500° C., infiltrating the green body or the work piece with one or more wetting elements or infiltrating the green body or the work piece with one or more wetting alloys, which infiltration step being carried out under vacuum or in an inert gas atmosphere at a pressure <200 Bar. The invention relates further to a green body, a diamond metal composite, and use of the diamond metal composite.

What is claimed is: 
     
         1 . A diamond metal composite body obtained by mixing diamond particles with metal-filler particles forming a diamond/metal-filler mixture, forming a green body of the diamond/metal-filler mixture, optionally green machining the green body to a work piece before or after pre-sintering by heating the green body to a temperature <500° C., infiltrating the green body or the work piece with one or more wetting elements or infiltrating the green body or the work piece with one or more wetting alloys, the infiltration step being carried out under vacuum or in an inert gas atmosphere at a pressure <200 Bar, wherein the diamond metal composite body comprises diamonds, filler particles and wetting elements or wetting alloys, wherein the filler particles are selected from one or more elements or one or more alloys of the elements from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Tc, Re, Fe, Co, Ni, and Si, and wherein the wetting elements or the wetting alloys being selected from one or more elements of the group consisting of Mn, Cr, Mo, W, Fe, Co, Ni, Cu, Ag, Au, Al, and Si. 
     
     
         2 . A diamond metal composite body comprising diamond particles, metal filler particles, one or more wetting elements or one or more wetting alloys, and reaction products between diamond, metal filler and wetting elements, obtained by mixing the diamond particles with the metal-filler particles forming a diamond/metal-filler mixture, forming a green body of the diamond/metal-filler mixture and machining the green body before or after pre-sintering, wherein the green machining being cutting, sawing, drilling, milling, or turning, pre-sintering by heating the green body to a temperature <500° C., infiltrating the green body or the work piece with one or more wetting elements or infiltrating the green body or the work piece with one or more wetting alloys, which infiltration step being carried out under vacuum or in an inert gas atmosphere at a pressure <200 Bar. 
     
     
         3 . The diamond metal composite body according to  claim 2 , wherein the green body comprises a binder selected from the group consisting of polymers, resin, cellulose and starch, and the amount of the binder being less or equal to 10 wt %.