CONTENTS

Production, Structure, Properties

Mechnik V. A., Rucki Miroslaw, Ratov B. Т., Bondarenko N. A., Gevorkyan E. S., Kolodnitskyi V. M., Chishkala V. A., Morozova O. M., Kulich V. G. Structure of C_diamond–(WC–6Co)–ZrO₂ composite materials formed by electric plasma-spark sintering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

Vedel D. V., Mazur P. V., Grigoriev O. M., Melakh L. M., Bega M. D., Kozak I. V. Obtaining and mechanical properties of high-entropy ceramics (TiZrHfNbTa)C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29

Pryimak L. B., Dovhal A. H., Varijukhno V. V. Wear resistance research of the new composition materials made of alumina intended for specific tribotechnical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39

Gevorkyan E. S., Nerubatskyi V. P., Vovk R. V., Chyshkala V. O., Kislitsa M. V. Structure formation in silicon carbide–alumina composites during electrocon­solidation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

48

Zhang Qianwei, Shi Kaihua, Gu Jinbao, Dong Kailin, Zeng Wei, Wang Peng, Liao Yu. Effect of carbon content near the decarbonization phase boundary on the physical and mechanical properties of WC–6 wt %  Co cemented carbide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

Investigation of Machining Processes

Filatov Yu. D., Sidorko V. I., Boyarintsev A. Y., Kovalev S. V., Kovalev V. A. Material removal rate in polishing of polymer optical materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

70

Tools, Powders, Pastes

Мanokhin А. S., Кlymenko S. А., Stolboviy V. О., Kolodiy I. V., Кopieikina М. Yu., Klymenko S. An., Kamchatna-Stepanova K. V., Serdyuk I. V. A stressed state in the cutting zone of the PcBN tool with coating based on TiAlSiYN system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

81

Letters to the Editor

Solozhenko V. L. On hardness of boron subarsenide B₁₂As₂. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

93