CONTENTS

Production, Structure, Properties

Ratov B. T., Mechnik V. A., Bondarenko N. A., Strelchuk V. V., Prikhna T. A., Kolodnitskyi V. M., Nikolenko A. S., Lytvyn P. M., Danylenko I. M., Moshchil V. E., Gevorkyan E. S., Chishkala V. A., Kosminov A. S., Shukmanova A. A. Phase formation and physical-mechanical properties of WC–Co–CrB₂ composites sintered by vacuum hot pressing for drill tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .

3

Kubliy V. Z., Utkin S. V., Bondar A. A., Artiukh S. Yu. Properties of phases in Mo–Fe–B alloys with boron content up to 40 at % after annealing at subsolidus temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

17

Upatov M. I., Yefimenko M. Yu., Vleguels D., Bogomol Yu. I. Directionally a crystallized ternary eutectic composite of the B₄C–TaB₂–SiC system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .

27

Investigation of Machining Processes

Filatov Yu. D., Sidorko V. I., Boyarintsev A. Y., Kovalev S. V., Garachenko V. V., Kovalev V. A. Influence of spectroscopic parameters of the processed material and polishing powder for polishing of optical surfaces. . . . . .

36

Lavrinenko V. I., Pasichnyi O. O., Poltoratskyi V. G., Solod V. Yu., Muzychka D. G. Peculiarities of shape change of the cutting surface of the grinding wheel in the circular direction when grinding wheels with a mixture of SHM grinding powders and with a modified surface of their grains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

47

Tools, Powders, Pastes

Vynohradova O. P., Zakora A. P., Shul’zhenko A. A., Gargin V. G., Sokolov A. N., Efrosinin D. V., Zakora I. А. Comparative estimation of the performance of drilling bits with diamond-containing matrix and inserts from diamond-containing composites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

Xu Jinyang, Ji Min, Li Linfeng, Chen Ming. Evaluation of polycrystalline diamond tools in milling of pre-sintered and fully-sintered zirconia ceramics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

Letters to the Editor

Fesenko I. P., Romanko L. O., Chasnyk V. I., Vovk L. M., Tuz Yu. M., Dovhal A. V., Serbeniuk T. B., Kaidash O. M., Bochechka O. O., Rukin V. P. Electric-physical characteristics of pressureless sintered AlN–TiN ceramic composite. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

77