Use of Interfacial Exothermic Effect in the Wetting Process, Production of Composites, and Soldering of Ceramic Materials

The wetting of some nonmetals coated with nickel and deposited in vacuum at 700°C using molten aluminum is studied. The sessile drop method and capillary purification are used. The threshold thickness of wetting is 150 nm for most materials and 400 nm for basalt. The high degree of wetting is observed because the metal melt wets better metal coatings than coated nonmetallic materials. Moreover, exothermic reactions to form aluminum nitrides take place in the system.