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A novel composite diamond-containing dispersed material of natural and synthetic diamonds powders and abrasive tools made of it

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Abstract

A two-stage process of producing a novel composite material based on fine-dispersed powders of natural diamonds and mesh grinding powders of synthetic diamonds. At the first stage of producing the components mixture is compacted and at the second stage it is sintered in a gas-thermal reactor of the physicochemical synthesis plant at a temperature of 1100-1200 °C and below ambient pressure in the methane atmosphere. The values of the morphometric characteristics and the uniformity of abrasive powders in these characteristics produced from the new diamond-containing material, their physico-mechanical and electrophysical properties were studied. The results of the use of these composite powders in grinding wheels for machining a hard alloy are discussed. A substitution of powders of the new composite material for synthetic diamond mesh powders in the cutting layer of a standard grinding wheel makes it possible to essentially (more than by a factor of 3) increase the wear resistance of the tool.

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... On the other hand, a significant difference can be observed for the natural diamond, which displayed a much lower resistance to wear. The different behavior of the CVD and natural diamond tools are in agreement with [4,[63][64][65], which means that the diamond material has a strong influence on the tool lifetime and its wear development. Furthermore, it can be clearly noted in Figure 2 that both dressing tool diamond tips presented the same tendency during the dressing experiments, i.e. the worn area and the number of dressing passes increases linearly. ...
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