Promising directions in studying and using polycrystalline diamond coating Ludmila Perepechko, Natalia Protsenko, Anastasia Rakhmanova, Nikolay Timoshenko, Vasiliy Tikhonovich, Svetlana Filatova and Irina Sharina E3S Web Conf., 459 (2023) 01005 Published online: 04 December 2023 DOI: 10.1051/e3sconf/202345901005