Abstract
The conditions for cladding of diamond and superhard macropowders with composite electrolytic coatings are studied. The coating characteristics are established to depend on the pretreatment, electrolyte concentration, current density, and deposition duration. The optimal coating layer 120–150 μm in thickness is produced at a current density of 2.5–3 kA/m2. The conditions for making composite materials from diamond-like clad powders by filed-associated sintering are examined. It is shown that current density and heating rate are the determining factors. The properties of a composite material become optimal at a current density of 8.28 · 106 A/m2 and a total sintering time of no longer than 120 sec. Tools made from such composite materials can be used for machining granite and marble. The performance of composite materials produced from clad superhard diamond macropowders is higher than that of materials from a mixture of cobalt and diamond powders.
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