Three-dimensional woven ceramic matrix composites

WO2026035566A3PCT designated stage Publication Date: 2026-06-04RTX CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
RTX CORP
Filing Date
2025-08-01
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Three-dimensional woven composites face defects during the weaving process that degrade their in-plane, through-thickness, and impact properties, compromising mechanical performance.

Method used

A three-dimensional woven ceramic matrix composite is developed with a densified structure comprising a multilayer coating material structure on inorganic fibers, including layers of boron nitride, silicon nitride, and alternating layers of silicon nitride and boron nitride, enhancing the composite's durability and mechanical properties.

Benefits of technology

The multilayer coating structure significantly improves the composite's impact resistance, compression after impact, and delamination control without reducing mechanical properties along the plane, leading to enhanced performance.

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Abstract

A gas turbine engine component, comprises a densified three-dimensional woven ceramic matrix composite comprising the shape of the gas turbine engine component, the densified three-dimensional woven ceramic matrix composite further comprises a three-dimensional woven structure comprising a densified ceramic matrix disposed on, within and throughout a three-dimensional weave comprising at least one inorganic fiber comprising at least one multilayer coating material structure disposed thereupon, wherein the at least one multilayer coating material structure comprises at least one first interface coating material layer comprising a boron nitride; at least one coating material layer comprising a silicon nitride; at least one second interface coating material layer comprising the boron nitride; and at least one third interface coating material layer comprising a Si3N4-BN multilayer coating having one or more alternating layers comprising at least one layer of silicon nitride at a first thickness; and at least one layer of boron nitride at a second thickness.
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