Wear resistance of diamond polycrystalline elements sintered at a pressure of 8 GPa from diamond powder synthesized in the Mg–Zn–C system
Abstract
Polycrystal samples were obtained by high-pressure sintering of diamond powders synthesized in the Mg–Zn–C system. A study of the wear resistance of the obtained samples was carried out by turning a cylindrical core of granite of the Korostyshiv deposit of the X category of roughness. It is shown that the polycrystals sintered in the high pressure apparatus (HPA) "Toroid 20" at a pressure of 8 GPa and a temperature of 1780 oC from an unclassified synthesis product have a wear resistance 30 times higher than the wear resistance of polycrystals sintered from a finely dispersed powder with a particle size of less than 40 μm. The wear resistance of samples of diamond polycrystalline elements with a diameter of 15 mm and a height of 3 mm, sintered in the HPA "Toroid 30" under the same conditions from the synthesis product in the Mg–Zn–C system, is 5.6–10.9 times higher than the wear resistance of the control sample, sintered from the powder synthesized in the Ni–Mn–C system.
