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Leon Izrailevich Feldgun

Vladislav Sergeevich Lysanov

Alexei I Prikhna

Mark Simonovich Drui

Alexandr A Shulzhenko

Jury Vladimirovich Naidich

Boris A Glagovsky

Viktor V Digonsky

Alla Alexandrovna Lavrinovich

Nikolai Stepanovich Zjukin

Igor Borisovich Moskovenko

Alexandr Lazarevich Khait

Larisa Ruvimovna Frenkel

Galina Alexeevna Kolesnichenko

Boris Dmitrievich Kostjuk

Zinovy Illich Kremen

Ljudmila Yakovlevna Slavina

Yakov Abramovich Muzykant

Nikolai V Novikov

Valery M Davidenko

Anatoly Samoilovich Kamenkovich

Alexandr I Borimsky

Veniamin Alexandrovich Yashin

Valerian D Yakimenko

Galina Alexandrovna Shashkina

Eduard Y Dovgal

Vyacheslav S Rovsha

Garri Shmilevich Roitshtein

Alexandr N Sokolov

Vitaly Y Egorov

Disclosed is a method of producing cubic boron nitride, which comprises the steps of subjecting to a pressure of from 40 to 70 kilobars and to a temperature of from 1100.degree. to 2000.degree. C. a charge including hexagonal boron nitride and a conversion initiator selected from the group consisting of alkali and alkaline earth metals and borides of the foregoing metals, doping the charge with crystallohydrate in the form of a compound selected from the group consisting of sulfur-, halogen- or nitrogen-containing salts and their mixtures incorporating at least 5 molecules of crystallization water. According to another embodiment, the aforesaid charge is doped with a member selected from the group consisting of alkali metal hydroxide or alkaline earth metal hydroxide.

Method of producing cubic boron nitride

The herein-proposed alloy is characterized in that it contains apart from such known components as copper, tin, aluminium, cadmium, zinc, titanium, chromium, zirconium, manganese, molybdenum, tungsten, iron, cobalt and nickel also vanadium, niobium, tantalum and boron taken either separately or in combination, in an amount of 0.001 to 80 weight percent of the total weight of all the components thereof. The alloy is advantageous in possessing good technological characteristics, being resistant to oxidation at elevated temperatures, featuring good adhesion to all kinds of abrasive materials and giving strong brazing alloys and metallization coatings.

Alloy for metallization and brazing of abrasive materials

A method of testing wear-resistance of articles which comprises measuring the rate of propagation of ultrasonic oscillations in a reference article which has the lowest admissible wear resistance. The rate of propagation of ultrasonic oscillations in the articles being tested is compared with the rate in the reference article. The reference article is placed into a liquid in the suspended state and the articles being tested are placed into the same liquid. Those articles, which ascend to the surface, are rejected.

Method of testing wear resistance of articles on the basis of

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Saint-Petersburg, Russia

Leon Izrailevich Feldgun