Self-Healing Environmental Barrier Coating

摘要

The present inventions incorporate self-healing mechanisms into current and future EBC systems. Such approaches have the potential to form environmental protection materials (i.e. thermally grown silicate compositions) in-situ to enable the ability to provide environmental protection to SiC based ceramics even in the event that cracks or voids form from within the EBC layer. In this disclosure, novel, self-healing EBC systems are disclosed along with coating synthesis techniques required to deposit the materials, microstructures and architectures. This research is anticipated to result in a thermal/environmental barrier coating system (T/EBC) that provides improved durability over current coatings. These advancements will aid the use of Si-based ceramics in a range of high temperature applications such a gas turbine engines and heat exchangers. These advances will not only benefit military engines, but also commercial and industrial engines requiring greater performance.

主权项

1. A self-healing coating to protect ceramic matrix composite substrates from environmental attack comprising:
a self-healing section that forms an environmental barrier coating upon exposure to an oxidizing environment; a bond coat/EBC section to provide protection from a combustion environment; an impact and CMAS resistant thermal barrier coating section;wherein at least one of the sections comprises a multilayer coating architecture.