▎ 摘　　要

NOVELTY - Invention relates to the field of materials science and can be used in the manufacture of heat sinks, detectors of ionizing radiation, infrared windows, hardening and wear-resistant coatings on parts and cutting tools. First, a suspension containing nanodiamond powders is prepared and dispersed under ultrasonic action with a power of 500-1000 W. Then a substrate is placed in the suspension, for example, made of silicon or materials based on it, for deposition of nanodiamond powders on it under ultrasonic action with a power of 250-350 W. After that, a graphene layer containing 3-10 monolayers is deposited on the substrate. A polycrystalline diamond film is deposited onto a substrate by chemical vapor deposition (CVD), during which the graphene layer is etched off. USE - Materials science. ADVANTAGE - Continuous homogeneous dense polycrystalline diamond film is obtained. 3 cl