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METHODS OF FORMING CERAMIC MATRIX COMPOSITES USING SACRIFICIAL FIBERS AND NON-WETTING COATING
Methods for preparing ceramic matrix composites using melt infiltration are provided as well as the resulting ceramic matrix composites. The methods and products include the incorporation of a non-wetting coating to one or more sacrificial fibers. The one or more sacrificial fibers are removed, such as decomposed during pyrolysis, resulting in the formation of a plurality of functional features, in the form of regular and elongate channels along the ceramic matrix composite. During the removing of the one or more sacrificial fibers, the non-wetting coating remains on an interior surface of the plurality of functional features to block infiltration of an infiltrant to the plurality of functional features and deposition thereon. Alternatively, the sacrificial fibers may be removed subsequent to melt infiltration. The sacrificial fibers are preferably organic fibers. The non-wetting coating comprises silica, boron trioxide or alumina. The sacrificial fibers also contain one or more sacrificial polymer coatings.
METHODS OF FORMING CERAMIC MATRIX COMPOSITES USING SACRIFICIAL FIBERS AND NON-WETTING COATING
Methods for preparing ceramic matrix composites using melt infiltration are provided as well as the resulting ceramic matrix composites. The methods and products include the incorporation of a non-wetting coating to one or more sacrificial fibers. The one or more sacrificial fibers are removed, such as decomposed during pyrolysis, resulting in the formation of a plurality of functional features, in the form of regular and elongate channels along the ceramic matrix composite. During the removing of the one or more sacrificial fibers, the non-wetting coating remains on an interior surface of the plurality of functional features to block infiltration of an infiltrant to the plurality of functional features and deposition thereon. Alternatively, the sacrificial fibers may be removed subsequent to melt infiltration. The sacrificial fibers are preferably organic fibers. The non-wetting coating comprises silica, boron trioxide or alumina. The sacrificial fibers also contain one or more sacrificial polymer coatings.
METHODS OF FORMING CERAMIC MATRIX COMPOSITES USING SACRIFICIAL FIBERS AND NON-WETTING COATING
VERFAHREN ZUR HERSTELLUNG VON VERBUNDWERKSTOFFEN MIT KERAMISCHER MATRIX UNTER VERWENDUNG VON OPFERFASERN UND NICHTBENETZENDER BESCHICHTUNG
PROCÉDÉS DE FORMATION DE COMPOSITES À MATRICE CÉRAMIQUE À L'AIDE DE FIBRES SACRIFICIELLES ET DE REVÊTEMENT NON MOUILLANT
DUNN DANIEL (Autor:in) / MCGUIGAN HENRY (Autor:in)
23.06.2021
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
Methods of forming ceramic matrix composites using sacrificial fibers and non-wetting coating
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