Analysis of the Grain Boundary Adsorption Activity for Alloying Elements in Binary Fe-Alloys  Full text 

I.F. Tkachenko, F.K. Tkachenko

Pryazovskyi State Technical University

UDC 669.14:669.788.001.5

Metall. Min. Ind.,  2011, Vol. 3, No. 6, pp. 265-268

Abstract

Theoretical analysis of the Gibbs isothermal adsorption equation was conducted and impossibility to identify with its help alloying elements on their adsorption activity is shown. Within the frame of quasi-chemical model of solid solutions, using the early obtained crosscorrelation dependences between the fundamental elements parameters and electronic structure of their atoms, a methodology for quantitative determination of adsorption activity of alloying elements was worked out for binary Fe-based solid solutions. It is shown that among the investigated elements, the level of grain-boundary adsorption activity decreases twice in transition from Ca to Mn and Si. High level of linear cross-correlation is revealed between the level of adsorption activity and electron concentration on external atomic energy levels.

Keywords: ALLOY, IRON, ALLOYING ELEMENTS, ADSORPTION ACTIVITY, ANALYSIS