CONTENTS

Production, Structure, Properties

Oleinik G. S. Structural transformations during the formation of superhard materials based on the initial powders of wurtzitic boron nitride. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .

3

Kurdyumov A. V., Britun, V. F. Yarosh V. V. Danilenko A. I., and Zelyavskii V. B.  The influence of the shock compression conditions on the graphite transformations into lonsdaleite and diamond. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

27

Letsoalo T. E. and Lowther  J. E. Elastic and thermodynamic properties of potentially superhard carbon boride materials. . . . . . . . . . . .

38

Sedov V. S., Ral’chenko V. G., Khomich A. A., Sizov A. I., Zvukova T. M., and Konov V. I. Stimulation of the diamond nucleation on silicon substrates with a layer of polymeric precursor in deposition of diamond films by microwave plasma. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

49

Zaloga V. A., Krivoruchko D. V., Lebedev V. Ya., and Zaloga O. A. The effect of the nitrogen ion–beam implantation on adhesiveness of the WC–8Co hard alloy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .

58

Investigation of Machining Processes

Klimenko S. A., Manokhin A. S., and Mel’niichuk Yu. A. Wear and life of tools with inserts from cBN-based polycrystalline superhard materials in the finish turning of hardened steels at heavy feeds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

Lavrinenko V. I., Solod V. Yu., Sytnik B. V., Devitskii A. A., Nikitin Yu. I., Poltoratskii V. G., Pasichnyi O. O., Skryabin V. A. Studies of the possibility to effectively use mineral granular concentrates as supporting elements in the working layer of diamond wheels. . . . . . . . . 

75

Tools, Powders, Pastes

Novikov N. V., Maistrenko A. L., and Prokopiv N. M. Formation of diamond-carbide granules to be used in rock destruction tools. . . . . . .

84

Letters to the Editor

Chasnyk V. I.  High absorption of the microwave energy in a system with strongly elongated molybdenum grains in aluminum nitride matrix at frequencies of 9.5–10.5 GHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

94

Jubilees, Dates

V. N. Bakul Institute for Superhard Materials, National Academy of Sciences of Ukraine: to the 50th anniversary of Academician Paton’s activity at the post of the President of the National Academy of Sciences of Ukraine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

98