MATHEMATICAL MODELING OF PSHM DIAMOND SYNTHESIS TECHNOLOGICAL PROCESS FOR TOOL PURPOSE
With the use of a method of computational and experimental modeling the mathematical model of the process of obtaining the polycrystalline superhard material with the improved physical-mechanical characteristics is developed, which makes it possible to calculate boundary P-, T-parameters of the thermobaric sintering of polycrystalline material based on modified micro- and nanopowders of diamond. Thus, on the basis of the results of computational and experimental modeling it is established that in order to obtain optimum hardness and crack resistance coefficient of diamond material the parameters of the process of thermobaric sintering must be within the following ranges: the temperature of the sintering T = 1900 °С ± 25 °С, pressure P = 6,5 GPa ± 0,25 GPa, an amount of addition of the nanodiamond powder, modified by boron С = 20 wt. % ± 2.5 wt. %.