METHOD FOR PROTECTING A HYBRID CERAMIC STRUCTURE FROM MOISTURE ATTACK IN A HIGH TEMPERATURE ENVIROMENT

摘要

A method for protecting the hybrid ceramic structure from moisture attack in a high temperature combustion environment is provided. The structure includes a ceramic matrix composite (CMC) substrate (12). A thermal insulation material (14) is disposed on the substrate. A vapor resistant material (20) is applied through at least one surface of the hybrid ceramic structure while the hybrid ceramic structure is in a bisque condition that provides a degree of porosity to the hybrid ceramic structure so that the vapor resistant material is infiltrated through interstices available within a thickness of the hybrid ceramic structure.

主权项

1. A method for protecting a hybrid ceramic structure from moisture attack in a high temperature combustion environment containing moisture, the hybrid ceramic structure comprising a ceramic matrix composite substrate and a thermal insulation material disposed on the substrate, the method comprising:
processing the hybrid ceramic structure to be in a bisque condition that provides a degree of porosity to the hybrid ceramic structure; applying a vapor resistant material through at least one surface of the hybrid ceramic structure while the hybrid ceramic structure is in the bisque condition; as a result of the degree of porosity provided by the bisque condition, infiltrating the vapor resistant material through interstices available within a thickness of the hybrid ceramic structure; and sintering the hybrid ceramic structure to a fully sintered condition.