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US 12,522,321 B2Granted
Sacrificial yarn filament for use in ceramic matrix composites, methods of manufacture thereof and articles comprising the same
AssigneeRtx Corporation
InventorsKathryn S. Read, Zachary P. Konopaske, Steven R. Clarke, Aaron Tomich
Life of this patent
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Abstract
Disclosed herein is a composite tow comprising a plurality of ceramic filaments; one or more sacrificial yarn filaments; where the sacrificial yarn filaments are operative to undergo decomposition or melting upon being subjected to an elevated temperature; and wherein the sacrificial yarn filaments leave open spaces in the tow upon being subjected to decomposition, dissolution or melting; where the filaments have an average filament diameter of 5 to 15 micrometers.
Claims17
A composite tow comprising:
- a plurality of ceramic filaments;
- and
- one or more sacrificial yarn filaments co-mingled with the plurality of ceramic filaments;
- where the sacrificial yarn filaments are operative to undergo decomposition, dissolution or melting upon being subjected to an elevated temperature to leave only the plurality of ceramic filaments and open spaces between the plurality of ceramic filaments;
- where the ceramic filaments have an average filament diameter of 5 to 15 micrometers;
- wherein the sacrificial yarn filament is present in the composite tow in an amount of greater than or equal to 30 volume percent, based on a total volume of the composite tow.
3 more elements
A method comprising:
- co-mingling a plurality of ceramic filaments with one or more sacrificial yarn filaments to form a composite tow;
- where the ceramic filaments have an average filament diameter of 5 to 15 micrometers;
- wherein the sacrificial yarn filament is present in the composite tow in an amount of greater than or equal to 30 volume percent, based on a total volume of the composite tow;
- decomposing the one or more sacrificial yarn filaments to leave only the plurality of ceramic filaments and open spaces between the plurality of ceramic filaments;
- and
- infiltrating the open spaces with a ceramic precursor to form a tow that includes the ceramic precursor between the plurality of ceramic filaments.
3 more elements
Dependencies are inferred from the claim text.