Patent ID: 9663851
Date: 2017-05-30
CPC Classifications: C23C,Y10T

Claim:
1. A method for the preparation of a diamond deposition surface on a base body of hard material, wherein a matrix layer is deposited on a surface of the base body by an electric spark discharge, said matrix layer comprising a first metal selected from a first group of Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W, and/or a first compound between said first metal and a non-metallic substance selected from boron, carbon and nitrogen, said matrix layer holding seed diamond particles spread in/over the matrix layer that have an average particle size of 1 μm or smaller, the deposition of the matrix layer is conducted under the effect of heat, such that a diffusion of atoms of said first metal and/or a component metal of said hard material is caused to proceed between the matrix layer and base body from one to the other in either direction and thereby a joint zone is formed to extend over said matrix layer and said base body, for joining said matrix layer and said base body to each other, and wherein the electric discharge is operated with parameters of single pulse power input energy E, pulse current frequency f and number of total pulses in the deposition process N set and held at: