초록 ▼

A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix

A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.

대표청구항 ▼

What is claimed is: 1. A ceramic matrix composite article comprising:a ceramic matrix composite substrate comprising silicon carbide and containing a ceramic reinforcement material in a ceramic matrix material, a fraction of the reinforcement material being at a surface of the substrate, wherein at

What is claimed is: 1. A ceramic matrix composite article comprising:a ceramic matrix composite substrate comprising silicon carbide and containing a ceramic reinforcement material in a ceramic matrix material, a fraction of the reinforcement material being at a surface of the substrate, wherein at least a portion of the ceramic reinforcement material is coated with interface layers comprising boron nitride and carbon and wherein an outermost interface layer is coated with at least one coating layer comprising silicon carbide or silicon nitride; anda ceramic protective layer on the ceramic matrix composite substrate defining an outermost surface of the ceramic matrix composite article, wherein the ceramic protective layer comprises carbon-containing filamentary material and does not comprise the reinforcement material of the ceramic matrix composite substrate.