Cel The main objective of the proposed research is the establishing of correlation between the energy and the other properties (such as diffusivity and chemical composition) of the free surfaces and grain boundaries in Fe(Si) and Nb. The completely new approach will be used to implement the project. The cylindrical bicrystals, in which the inner cylindrical grain is embedded in the outer one will be grown from the melt by the electron-beam floating zone technique at the Institute of Solid State Physics in Chernogolovka, Russia. In such a bicrystal only one from five macroscopic geometrical degrees of freedom of the grain boundary is varied along its length, namely, the inclination, while the other four degrees of freedom stay constant with the high accuracy. The group in Chernogolovka posses a worldwide unique equipment and experience in growing of single crystals and bicrystals of refractory metals and alloys by the electron beam floating zone technique. On such cylindrical bicrystals, the inclination dependence of the grain boundary energy and of the parameters of grain boundary diffusion will be determined.Also the orientation dependence of the surface energy will be determined. For this sake, different surfaces of the bicrystal will be prepared and the grain boundary will be used as an internal standard of energy. The energy will be determined by the measurements of the surface profile in the vicinity of the grain boundary groove in the atomic force microscope. Combined wetting experiment with the sessile drop placed at the grain boundary will make it possible to determine the absolute values of the interfacial and surface energies. The Auger electron spectroscopy of the segregation to the surfaces of the known energy in Fe(Si) will be also performed.The essential idea of the proposed joint research is in the used of the specially designed bicrystals with the grain boundary of constant misorientation, but exhibiting a wide spectrum of inclinations, for the study of the energetic, kinetic and chemical properties of the grain boundaries and free surfaces. This approach is unique and any other research group in the world has not tried it. For the first time, the kinetic properties and chemical composition of the grain boundaries and free surfaces will be directly correlated with their energies. The results are of great fundamental importance for the better understanding of the bonding at interfaces of surfaces and of the grain boundarying. Program(-y) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Temat(-y) 1B - Condensed Matter, Optics and Plasma Physics INTAS - INTAS Zaproszenie do składania wniosków Data not available System finansowania Data not available Koordynator TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY Wkład UE Brak danych Adres Technion City HAIFA Izrael Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (4) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko National Academy of Sciences of the Ukraine Ukraina Wkład UE Brak danych Adres Vernadsky ave. 34/1 252680 Kiev Zobacz na mapie Koszt całkowity Brak danych Russian Academy of Sciences Rosja Wkład UE Brak danych Adres Institutskii Prospekt 15 142432 Chernogolovka, Moscow district Zobacz na mapie Koszt całkowity Brak danych Universitat Munster Niemcy Wkład UE Brak danych Adres Wilhelm-Klemm-Str. 10 48149 Munster Zobacz na mapie Koszt całkowity Brak danych Uzbek Academy of Sciences Uzbekistan Wkład UE Brak danych Adres Khodzaev str. 33 700143 Tashkent Zobacz na mapie Koszt całkowity Brak danych
