Surface-Treated Ceramic Prepregs for Faster High-Temperature Processing
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Solution Overview
Problem
Existing fabric-reinforced ceramic matrix composite (CMC) materials require additional coatings that necessitate time, resource, and energy-intensive processes like drying, sintering, or painting, which are inefficient and not well-suited for high-temperature applications.
Innovation Solution
A method involving infiltration of inorganic fabrics and papers with slurry mixtures containing oxide components and liquid media, followed by drying and sintering, to create a surface-treated prepreg composite that enhances toughness, thermal resistance, and high-temperature strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If additional coating layers are applied to CMC materials to improve surface properties, then toughness and thermal resistance are enhanced, but production time and energy consumption increase significantly
Solution Approach 1:
The patent combines the fabric reinforcement and surface coating into a single integrated structure. The fabric itself is treated with ceramic slurry during the infiltration process, eliminating the need for separate coating steps. This merging of functions reduces production time while maintaining the desired surface properties and mechanical strength.
Solution Approach 2:
The surface treatment is performed preliminarily during the infiltration process before final sintering. By applying the ceramic slurry to the fabric and co-sintering it with the matrix, the surface coating is established in advance, eliminating subsequent coating operations and reducing overall production time.
2Temperature
If additional coating layers are applied to CMC materials to improve surface properties, then thermal resistance is enhanced, but energy consumption increases due to multiple processing steps
Solution Approach 1:
The patent merges the surface coating application with the infiltration process, so both the matrix and surface layer are sintered in a single thermal cycle. This eliminates multiple separate heating and cooling cycles, significantly reducing energy consumption while achieving the desired thermal resistance through the integrated ceramic surface layer.
3Reliability
If traditional coating methods are used on CMC materials, then surface properties are improved, but process complexity increases with multiple drying and sintering steps
Solution Approach 1:
The patent combines multiple process steps into a unified infiltration and sintering operation. The fabric is infiltrated with ceramic slurry and then co-sintered with the CMC matrix in a single process cycle, eliminating the need for separate drying and sintering steps required by traditional coating methods. This reduces process complexity while maintaining reliable surface properties.
4Strength
If fabric-reinforced CMC materials are used for structural applications, then mechanical properties are achieved, but additional surface treatment is required before final use
Solution Approach 1:
The surface treatment is performed preliminarily during the manufacturing process itself, specifically during the infiltration and sintering stages. This preliminary action ensures that the surface properties are established before the material is ready for final use, eliminating the need for post-manufacturing coating operations and improving ease of application.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method provides a more efficient and effective way to apply coatings, resulting in improved mechanical and thermal properties, reducing production time and enhancing the suitability of CMC materials for high-temperature applications.
Implementation Method 1
infiltrating an inorganic fabric with a first slurry mixture to form an infiltrated fabric
Implementation Method 2
drying the infiltrated fabric and the infiltrated paper concurrently
Implementation Method 3
sintering, or other processing (e.g., painting) steps
Data Source
AI summary
The present invention relates to surface-treated prepreg composites and corresponding methods of surface treating an inorganic fabric to form a surface-treated fabric reinforced prepreg composite. The method comprises infiltrating an inorganic fabric with a first slurry mixture to form an infiltrated fabric; optionally drying the infiltrated fabric; infiltrating an inorganic paper with a second slurry mixture to form an infiltrated paper; optionally drying the infiltrated paper; and applying the infiltrated paper to at least one surface of the infiltrated fabric to form a surface-treated prepreg composite.