| 摘要 |
A process for producing silicon-containing CMC articles. The process entails producing a matrix slurry composition that contains at least one resin binder and a SiC powder (24). The SiC powder is a precursor for a SiC matrix (22) of the CMC article and the resin binder is a precursor for a carbon char (30) of the matrix (22). A fiber reinforcement material is impregnated with the slurry composition to yield a preform (20), which is then heated to form a porous preform (20) that contains the SiC matrix (22) and porosity (26) and to convert the resin binder to the carbon char (30) that is present within the porosity. Melt infiltration of the porosity (26) is then performed with molten silicon or a molten silicon-containing alloy to react the carbon char (30) and form silicon carbide that at least partially fills the porosity (26) within the porous preform (20). The carbon char (30) constitutes essentially all of the elemental carbon in the porous preform (20). |
