Multilayer coating with self-sealing properties for carbon–carbon composites Original Research Article

This work proposes a simple and low cost method to deposit an effective multilayer protective coating on carbon–carbon composites (C/C). The first layer is made of molybdenum disilicide particles in a barium boron aluminosilicate glass (SABB); the second (external) layer is made of yttrium oxide modified SABB. A study of the reactions between the yttrium oxide and the SABB glass is presented. The coated C/C were submitted to thermal cycling or thermal aging tests up to 1300 °C in air. Weight losses were less than 0.5% in 50 h of thermal cycling and less then 1% in 150 h of thermal aging.