Temperature resistant abrasive polycrystalline diamond bodies

Abstract From the Canadian patent

Temperature resistant abrasive polycrystalline diamond bodies are described, intended for use as tools in various mechanical operations like turning, milling drilling, sawing and drawing, having different additions i.e. amount, and composition, of binding fluxing, catalyst metals at, different distances from the working surface. Preferably the metal concentration of the polycrystalline diamond body is decreasing towards the working surface while the metal composition is varied in a way that gives a mechanically stiffer matrix that also has a lower thermal expansion. In one embodiment the diamond body is high pressure-high temperature-bonded to a supporting body e.g. of cemented, carbide, in …