W 60 Смачивание сплавов на основе никеля карбонатными расплавами в условиях электрической поляризации [Text] = Wetting of nickel-based alloys by carbonate melts under conditions of electric polarization / В. С. Беляев, Л. М. Бабушкина, И. В. Яшкевич, В. П. Степанов // Коллоидный журнал. - 1995. - Т. 57, N 4. - P469-475. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): НИКЕЛЬ ХРОМ -- НИКЕЛЬ АЛЮМИНИЙ -- Li -- Li2CO3-K2CO3 -- K2CO3 -- K -- Li2CO3 -- Ni -- Al -- Cr -- СМАЧИВАНИЕ Аннотация: The change of the interfacial free energy at the interfaces betweennickel-aluminium and nickel-chromium alloys of varius composition and eutectic Li2CO3-K2CO3 melts was studied as a function of potential. Experiments were performed in oxidizing, reducing, and inert atmospheres at 910-940 K; the method of meniscus weight was used. It was found that the contact angle decreases from 88 degrees to 0 degrees when one passes from a reducing atmosphere to a neutral and then to an oxidizing one. A region of potentials characterized by the partial charge transfer from the adsorbed oxygen anions to an electrode was discovered. This charge transfer results in the formation of complex anions and in the reversal of the surface charge of alloys. The pattern of the change in the values of the contact angles and potentials at the point of zero charge with the composition of alloys is revealed. The results are discussed from the viewpoint of the interaction between the components of the alloy |