Bobina M.M.

Zirconium Nitring in a Closed Reaction Space

Currently there are methods for zirconium nitriding at high temperatures (1300-2000 C) and long-term exposure (up to 24 hours). This paper aims at developing a novel method of zirconium nitriding at lower temperature and exposure time, while maintaining such satisfactory mechanical properties as coating and matrix. Nitriding was conducted at 900 C for about 2 hours in an atmosphere of technically pure nitrogen. Samples were placed in the reaction chamber, which could provide the necessary degree of tightness and vacuum.

Heat-Tolerance of Carbide Coverages Obtained at a Successive Satiation of U8А Steel by Chrome and Titan

In this paper, we study the structure and properties of carbide coverages based on titan and chrome carbides on U8A steel. We discuss possible reactions of the interaction between chrome and titan carbides with oxygen and determine the chemism of coverages oxidization. Finally, we show the advantage of complex two-component coverages as compared to single-component ones

Chimism and thermodynamics of steel saturation by titanium and chrome

This paper studies the basic responses of carbides formation and equilibrium composition of reactionary space at the sequential steel saturation by chrome and titanium, employing the method of the thermodynamic assaying.