Papers by Author: L.F. Yamshchikov

Abstract: Thin scandium-containing layers fabricated by different methods are good systems to investigate some properties of Al-Sc intermetallic compounds (IMC). The electrochemical deposition of a thin scandium layer onto a solid metallic surface leads to complex diffusion processes, especially if the second metal forms a number of IMC with Sc. Here, we used the electromotive force (EMF) method to study thin Al-Sc films in dynamics. Also, the Al-Sc alloy layers were prepared by direct aluminium-scandium interaction. The results of SEM and EDX investigations of these alloys are also presented in this paper. Analogue coatings (like Sc on Ni, Y on Cu, Al on Ni etc.) were also considered in order to discuss the phase sequence formation.

Abstract: Properties of diffusive-hardening pastes based on liquid gallium have been investigated. The optimal conditions were found for producing the paste (solder) with best technological characteristics. The liquid-solid ratio, powder alloy composition and dispersity, dust fractions percentage, exposition time and temperature are the main factors which determine the rheological properties of the gallium paste.