Taranets' N. Adhesive interaction and wettability of aluminium nitride ceramic by metal melts

Aluminium nitride ceramics, metal melts. The aim was to obtaine the complex of experimental results as to wettability and adhesion interaction in the AlN ceramics - liquid metal systems and to determine the physico-chemical conformities of the capillary processes in these systems. The investigations were made by the "sessile drop" method using high vacuum installation. Temperature, concentration and time dependencies of the contact angles were received. The correlation was found between the value of the work of adhesion and the thermodynamic possibility of the chemical interaction in the interphase region. The rules were formulated as to wettability control in the AlN - metal systems. The recommendations were elaborated for the brazing of the aluminium nitride materials. The technology base was worked out and the brazing was made for the AlN ceramic part with the stainless steel case. The obtained results can be used also as handbook data, and for the solvation of some practical problems of brazing an d metallization of the AlN ceramic and metallurgical production.