Conferences

 CONTACT AND CAPILLARY PROCESSES IN SYSTEMS PROMISING FOR BRAZING SUCH AS EUTECTIC MELTS OF NIOBIUM WITH COBALT, NICKEL, AND IRON–NONMETALLIC Al2O3–SiO2 AND AlN–TiN MATERIALS

    

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2018, #09/10
http://www.materials.kiev.ua/article/2657

Abstract

The contact and capillary processes that occur in interaction of the eutectic Nb melts containing Co, Ni, and Fe with Al2O3–SiO2 and AlN–TiN solid substrates at 1400–1450 °С in 10–3 Pa vacuum have been considered. The microstructure and phase composition of the interaction products in the contact zone have been examined and thermodynamic analysis of potential reactions has been performed. The effect of the niobium metal solvent on these processes has been found, and explanation for the different wettabilities of the same substrates has been proposed in terms of the properties (composition and structure) of the solid phase formed at the metal–ceramic interface. An example of the potential use of these melts for brazing nonmetallic materials is provided.


BRAZING, CONTACT INTERACTION, EUTECTIC NB MELTS, NONMETALLIC MATERIALS, WETTABILITY