CONTENTS

Production, Structure, Properties

Matar S. F., Solozhenko V. L. Superhard hexagonal sp³-bonded BN polytypes and BC₂N from crystal chemistry and first principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .

3

Kvasnytsya V. M. Polyhedral shape of mineral inclusions in diamond crystals according to goniometry data. . 

17

Liu Jialin, Liang Baoyan, Jiao Mingli. Low-temperature synthesis of TiC coating on diamond surface by thermal explosion reaction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31

Ratov B. Т., Mechnik V. A., Bondarenko N. A., Gevorkyan E. S., Kolodnitskyi V. M., Kalzhanova А. B., Sundetova P. S., Utepov Z. G. Phase formation and diamond retention in C_diamond‒(WC‒Co)‒ZrO₂ composites sintered by the spark-plasma sintering method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .

39

Efremov A. A., Gontar O. G., Loginova O. B., Ilnytska H. D., Staryk S. P. Theoretical and experimental study of the behavior of liquid drops on heterogeneous surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

59

Investigation of Machining Processes

Sokhan’ S. V., Voznyy V. V., Sorochenko V. H. Diamond grinding of ceramic balls with a circular feed. . . . . . . .  

76

Tools, Powders, Pastes

Lavrinenko V. I. СNB wheels for grinding high-speed steel without cooling: specific processing energy and energy efficiency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

89

Letters to the Editor

Prikhna T. O., Barvitskyi P. P., Vasiliev O. O., Muratov V. B., Mazur P. V., Sverdun V. B., Kolodnitskyi V. M., Omelianenko V. I., Fesenko I. P. Thermal conductivity of hot-pressed AlB₁₂–AlN ceramic composite. . . . . . . . . . . . .

98