[en] In this article, a theoretical and experimental study of physicochemical interaction in the Cd Sb - Ni Sb system and eutectic composition based on a semiconductor with a significant thermal emf and a metallic phase possessing high electrical conductivity and good thermal conductivity is examined. (author)

[en] The paper presents the results of a systematic analysis of the melting temperature of inter metal compounds of lead-lanthanide systems of the compositions Pb₁₀Ln₁₁, Pb₃Ln₅, Pb₄Ln₅ and PbLn₂. Semiempirical method, which takes into account the peculiarities of the electronic structure of lanthanides and their influence on the properties of inter metal compounds, has determined and/or clarified the melting points of inter metal compounds of these compositions. On their basis the regularity of change of melting temperature of inter metal compounds depending on the nature of lanthanides with the manifestation of 'tetrad-effect' has been established. A mathematical model of regularities within lanthanide subgroups has been developed and compiled. (author)

[en] Using a semi-empirical method, the melting point of intermetallic compounds of the compositions Pb₃Ln, Pb₂Ln, Pb₄Ln₃, PbLn, Pb₁₀Ln₁₁, Pb₄Ln₅ and Pb₃Ln₅ was determined and/or clarified. Regularities of changes in the properties of intermetallic compounds depending on nature of lanthanides have been established. The patterns are complex with the manifestation of 'tetrad effect'. Mathematical models of regularities have been developed. (author)

[en] Present article is devoted to regularities in changes of temperature and enthalpy melting of some intermetallic compounds of lanthanoids(Ln)-aluminium (Al) systems. The values of melting temperatures of intermetallic compounds for aluminium and all line of lanthanoids have been defined.

[en] The oxidation kinetics of the Pb-Bi system alloys in the solid state has been studied by means of thermogravimetry method. The kinetic and energy parameters of the oxidation process of the alloys have been defined.

[en] The paper presents the results of system analysis of melting temperature of intermetallic compounds of lead-lanthanide system Pb₃Ln₅, PbLn₂ and PbLn₃. The analysis was carried out by the semi-empirical method developed by N. S. Poluektov with employees, which takes into account the features of the electronic structure of lanthanides and their influence on properties of intermetallic compounds. Certain and / or refined melting temperatures of these compounds allowed to determine regularities of their change depending on nature of lanthanides and to elaborate their mathematical models. (author)