This paper present experimental results related to ceramic development, some thermomechanical properties and experimental testing methods. Special emphasis is given to nondestructive evaluation for the quality control of the welds.

Ceramic-type backing systems offer a potential solution. Cordierite and cordierite-based ceramics are promising materials for high thermal shock resistance specially compared to alumina or mullite.

Mullite-cordierite composites with various mullite contents and microstructures were prepared by a conventional powder processing, i.e. mechanical mixing, forming of green bodies by dry pressing, and sintering at appropriate temperatures.

Cordierite and mullite powders were prepared separately and mixed to get the required compositions. All were sintered for 2h at 1350ºC, except for the pure cordierite and mullite which were soaked for 3h at 1300ºC and 1600ºC, respectively.

In all welding processes (MAG welding) test assemblies were made by butt welding. Test assemblies with visually acceptable beads were radiographed.

The quality control of the weld are verified by a nondestructive evaluation (visual, liquid penetrant, magnetic particles and ultrasonic).

Sintering characteristics, physical and the main thermo-mechanical properties of ceramic tiles were also determined.