Modelling of microwave assisted combustion synthesis applied to the joining of high temperature ceramics

Microwave (MW) irradiation at 2.45 GHz is a rapid and efficient way to ignite different kind of highly exothermic reactions involving powder mixtures, leading to the so-called combustion synthesis reactions. In the present work this technique was exploited to promote the rapid joining of high temperature ceramic materials composites, in a single mode applicator, applying a moderate pressure during the process. A multi-physics simplified model of the joining process between two SiC-based elements with the continuous application of microwaves was developed to study the effects on the combustion synthesis of powder mixtures preparation, microwave forward power and sample arrangement inside the applicator