Surface and contact phenomena in metallic systems and their technological applications

Summary The results of an extensive and systematic study of surface phenomena on the interface between liquid metals and various refractory compounds are presented and generalized. Values of surface energy and angle of contact are determined for liquid metals and alloys.The classification of binary metallic systems according to the isotherms of free surface energy is scientifically justified. The interface activity of shrinkage in liquid metal-solid systems and the kinetics of infiltration of porous materials with liquid metals are investigated.The effect of the degree of wetting, amount of the liquid phase, initial porosity, and temperature on densification kinetics during sintering was studied in several systems.New methods of soldering ceramics to ceramics and to metals are described. Alloys and processes are proposed for soldering optical quartz to metals and for high temperature soldered joints between metals and ceramics. The use of adhesion-active binders for diamond tools and a method of metallization of diamond particles have been developed. The possibility of preparation of sintered sealing materials from porous iron with a low-melting filler is indicated.Abridged paper to the annual meeting of the Section of Physicotechnical Problems of Materials Science, Academy of Sciences, UkrSSR, February 19, 1964.