Interfacial Forces in Si_3N_4-and SiC-Based Systems and Their Influence on the Joining Process

摘要

High-temperature interactions between solid ceramic grains and liquid glass result in final microstructures in which the grain-to-grain distance is governed by the spe- cific equilibrium among the interfacial forces. Useful infor- mation for many practical applications is obtained by treat- ing the system of interest as a high-temperature colloidal suspension and studying interactions among the constitu- ents. Si_3N_4 and SiC silicate systems are investigated in the present study as dispersed suspensions, after liquid- penetration experiments and long oxidation treatment at high temperature.