CONTENTS

Production, Structure, Properties

Shcheretskyi O. A., Shcheretskyi V. O., Stratiichuk D. A., Turkevych V. Z., Osipov A. S. The effect of oxygen on the interaction of a high-entropy alloy (NiFeCoCrTiAl) with cubic boron nitride. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

Barvitskyi P. P., Prikhna T. O., Ünsal H., Moshchil V. E., Hičák M., Tatarko P., Karpets M. V., Lokatkina A. S., Kolodnitskyi V. M., Bilorusets V. V., Ponomaryov S. S., Devin L. M., Rychev S. V., Prysiazhna O. V., Marchenko А. А. Influence of content, physic and chemical properties of SiC on the heat resistance and mechanical characteristics of ultra-high-temperature HfB₂–SiC composites hot-pressed-produced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

Matar S. F. Novel high-symmetrical superhard C₄₈ and C₃₂ allotropes with original topologies: crystal engineering and DFT investigations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

33

Jiang Yufei, Fang Lili, Wang Jianjun, Yang Weifei, Zhang Kun. Enhanced thermal stability by Ti–Cu coating on cBN particle surface using vacuum vapor deposition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

42

Liudvichenko O. P., Lyeshchuk O. O., Petrusha I. A., Gordieiev S. O., Sadovyi B. S., Sadovyi P. S., Sadova Yu. I., Nikolenko A. S., Turkevych V. Z., Porowski S., Grzegory I. High pressure-high temperature crystallization of GaN: modeling and experimental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

52

Omelianenko V. I., Fesenko I. P., Romanko L. O., Staryk S. P., Kaidash O. M., Oleǐnik G. S., Chasnyk V. I., Kolodnitskyi V. M., Zakharchuk H. P. Structure, thermal conductivity and electrical resistivity of aluminum nitride–titanum nitride composite in percolation region. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

Investigation of Machining Processes

Sokhan’ S. V., Voznyy V. V., Sorochenko V. H. Efficiency of diamond grinding ceramic balls. . . . . . . . . . . . . . . . . . . . .

77

Tools, Powders, Pastes

Dutka V. A., Maystrenko A. L., Kolodnitskyi V. M., Zabolotnyi S. D. Effective model of thermal processes during friction stir welding of heat-resistant alloys with a superhard materials tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

91