초록 ▼

A method for enhancing the cooling capability of a turbine component made from a ceramic matrix composite. The method improves the thermal performance of the component by producing a surface having increased cooling capacity, thereby allowing the component to operate at a higher temperature. The met

A method for enhancing the cooling capability of a turbine component made from a ceramic matrix composite. The method improves the thermal performance of the component by producing a surface having increased cooling capacity, thereby allowing the component to operate at a higher temperature. The method tailors the available surface area on the cooling surface of the composite component by depositing a particulate layer of coarse grained ceramic powders of preselected size onto the surface of the ceramic matrix composite component. The size of the particulate is selectively tailored to match the desired surface finish or surface roughness of the article. The article may be designed to have different surface finishes for different locations, so that the application of different sized powders can provide different cooling capabilities at different locations, if desired. The compositions of the particulates are chemically compatible with the ceramic material comprising the outer surface or portion of the ceramic matrix composite. The particulates are applied using a slurry and incorporated into the article by heating to an elevated temperature without melting the matrix, the particulates or the fiber reinforcement.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for tailoring the surface area of a ceramic matrix composite by modifying a surface roughness, comprising the steps of:providing a ceramic matrix composite having ceramic fibers embedded in a ceramic matrix;providing ceramic particulates of preselected size, th

[ What is claimed is:] [1.]1. A method for tailoring the surface area of a ceramic matrix composite by modifying a surface roughness, comprising the steps of:providing a ceramic matrix composite having ceramic fibers embedded in a ceramic matrix;providing ceramic particulates of preselected size, the ceramic particulates being chemically compatible with the ceramic matrix composite;applying the ceramic particulates onto at least a portion of a predetermined surface of the ceramic matrix composite to form a substantially uniform layer on the surface;incorporating the particulate layer into the surface by heating the ceramic matrix composite to which the layer has been applied to a sufficient temperature to bond the particulates to the surface, thereby providing a surface roughness determined by the preselected size of the particulates.