CONTENTS

Production, Structure, Properties

Liudvichenko O. P., Lyeshchuk O. O., Petrusha І. А. Influence of the concentra­tion of components and the size of heaters on the thermal state of a high-pressure cell for studying the solubility of gallium nitride in iron. . . . . . . . . .

3

Krasovskyy V. P., Shapiro A. E. Wetting and soldering of superhard materials based on dense modifications of BN by solder melts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

14

Ratov B. T., Mechnik V. A., Rucki Miroslaw, Gevorkyan E. S., Bondarenko N. A., Kolodnitskyi V. M., Chishkala V. A., Kudaikulova G. A., Muzaparova A. B., Korostyshevskyi D. L. C_diamond–(WC–Co)–ZrO₂ composite materials with improved mechanical and adhesive properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

25

Prokopiv M. M., Ushchapovskyi Yu. P., Kharchenko O. V., Kramar H. M., Bodrova L. H., Kysla H. P. The influence of the rate of increase in gas pressure during vacuum-compression sintering on the structure and properties of VK6M hard alloy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .   

44

Cui Liang, Zhang Wangxi, Liang Baoyan, Wang Linlin, Jiao Mingli. HP-HT treatment of hexagonal boron nitride for higher photocatalytic degradation of organic pollutants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53

Hu Xixi, Sun Ailing, Liu Yang, Zhong Shenglin, Mo Peicheng, Wu Yi. Synthesis of TiC_0.5–Al and effect of sintering temperature on mechanical properties of PcBN composites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

59

Investigation of Machining Processes

Filatov Yu. D. New regularities of polishing surfaces of parts made of non-metallic materials. . . . . . . . . . . . . . .

70

Tools, Powders, Pastes

Petasyuk G. A., Sirota Yu. V. Comparative analysis of characteristics of the form of grain and abrasive ability of natural impact and synthetic diamond powders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

83

Letters to the Editor

Kulych V. G., Fesenko I. P., Kovtiukh M. O., Tkach V. M., Kaidash O. M., Kuzmenko Ye. F., Chasnyk V. I., Ivzhenko V. V. Microstructure and thermal conductivity of silicon infiltrated SiC-material. . . . . . . . . . . . . . . . . . . . . . . . .

94