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Results of investigations into strengthening the nickel host in the diamond composite electro chemical coating (DCEC) with nanodispersed particles are reflected. Diamond nanopowders of the detona tion synthesis, which were introduced into the DCEC through the electrolyte, are applied as the strengthen ing phase. As a result, the microhardness of the nickel host increased by a factor of 3, while the durability of tubular drilling tools after the deposition of the diamond coating increased by a factor of 4. The developed technology can be used when producing a diamond tool for cutting stone, glass, and ceramic materials, as well as to produce correcting tools. Fig. 4. X ray diffraction pattern of nanodiamonds. Inten sity lines correspond to the phase of cF8/1 cubic diamond.

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