№ 1—2003

CONTENTS
Production, Structure, Properties
Romanyuk A. V., Novikov N. V., Gorlov Yu. I., and Moshkovsky E. I. Electronic constitution and reactivity of surface structures of diamonds. . . . . . . . . . . . . . . .	3
Turkevich V. Z., Kulik O. G., Itsenko P. P., Sokolov A. N., Lutsenko A. N., and Vashchenko A. N. Phase diagram of the Mg–B system at high pressures. . . . . . .	9
Kolchemanov N. A., Nozhkina A. V., Laptev A. I., and Kolchemanov D. N. The effect of production conditions of carbonado diamond polycrystals on their magnetic properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15
Volkogon V. M. and Oleinik G. S. The effect of prerolling of wBN powder on the transformation of the wurtzitic phase into the cubic one in the course of producing Hexanite-R by sintering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	22
Zhunkovsky G. L., Evtushok T. M., Mazur P. V., and Kotenko V. A. Interaction in the Ti—B4C system. Communication 1. Special features of the formation of a resulting composite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	32
Vinogradov S. A. On the problem of the development of criteria for similarity to simulate a process of compression a thin disc between flat Bridgmen's anvils. . . .	36
Balabanov P. A., Borimsky A. I., Delevi V. G., Aleksandrova L. I., and Chipenko T. Yu. The effect of the quench conditions on the microstructure and mechanical properties of HPA matrices of the R6M5 steel produced by electroslag remelting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	47
Savchuk Ya. M., Prikhna T. O., Moshchil V. E., Sergienko N. V., Nagorny P. A., Melnikov V. S., Dub S. M., Gawalek W., Surzhenko O. B., Wendt M., and Schmidt K. High pressure synthesis of a MgB2-based superconducting material. . .	52
Investigation of Machining Processes
Matyukha P. G. and Grinev A. A. Cutting ability of a diamond wheel when grinding the R6M5F3 steel at a large area of the contact. . . . . . . . . . . . . . . . . .	62
Tools, Powders, Pastes
Zvonarev E. V., Baran A. A., and Belyaev A. V. Copper-tin bond modified with SVS powders for diamond stone-working tools. . . . . . . . . . . . . . . . . . . . . . . .	67
Petasyuk G. A. Stochastic mathematical model for the procedure of the sieve analysis of synthetic diamond grits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	71
Letters to the Editor
Solozhenko V. L., Solozhenko E. G., and Petitet J. P. On cubic boron nitride crystals grown in the BN—N—H system. . . . . . . . . . . . . . . . . . . . . . . . . . . .	78
Lisovsky A. F., Ivanov S. A., and Pereyaslov V. P. On the formation of mesostructures in sintered carbides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	80
Jubilees, Dates
70th anniversary of Academician P. S. Kisly. . . . . . . . . . . . . . . . . . . . . . . . . .	82