Glass Yarn Thermal Screen with Crystalline Oxide Coating
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Solution Overview
Problem
Textiles made of glass yarns used for thermal protection at temperatures between 400° C. and 900° C. face degradation, leading to reduced mechanical properties and shortened longevity, and require improved deformability to fit complex parts effectively.
Innovation Solution
A protective screen composed of glass yarns coated with crystalline oxide particles having a melting point above 1000° C., where the coating includes a dry binder that enhances deformability and is applied to the yarns before shaping to fit the part, improving thermal protection and longevity by physically isolating the part from heat sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass yarn fabric is used for thermal protection at 400-900°C, then thermal protection function is provided, but mechanical properties degrade and longevity is reduced
Solution Approach 1:
The patent applies composite materials by combining glass yarns with a coating layer containing protective particles (such as alumina, zirconia, or magnesia) and a dry binder. This composite structure provides thermal protection while the protective particles maintain mechanical properties at high temperatures (400-900°C), preventing yarn degradation and extending the service life of the protective screen.
Solution Approach 2:
The patent changes the chemical composition parameters of the coating by incorporating specific protective particles with high melting points and refractory properties. The coating composition is optimized to resist thermal degradation, thereby maintaining the mechanical integrity of the glass yarns under prolonged exposure to elevated temperatures.
2Ease of operation
If fabric is deformed to fit the part, then good deformability is achieved, but the structural integrity may be compromised
Solution Approach 1:
The patent employs a flexible protective screen structure that can be deformed to fit complex geometries of industrial parts. The screen maintains its structural integrity during deformation due to the reinforcement provided by the protective particle coating, which prevents excessive stretching or damage to the glass yarn fabric while allowing necessary flexibility for installation.
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 solution significantly improves the mechanical properties and longevity of the protective screen under high temperatures, maintaining effective thermal protection and deformability, thus extending the lifespan of the thermal protection system.
Implementation Method 1
a protective screen which is at least partially coated with a coating comprising protective particles of a crystalline material having a melting point above 1000° C. and consisting of one or more oxides
Implementation Method 2
the coating comprises protective particles of a crystalline material... and consisting of a dry binder and of said protective particles
Data Source
AI summary
A method for thermally protecting a part according to which a protective screen is placed in an in-use position in which the screen physically isolates at least one portion of the part from a heat source. The heat source is configured to bring the temperature of the at least one portion of the part to a temperature between 400° C. and 900° C. in the absence of the protective screen. The protective screen includes a substrate of glass strands at least partially coated with a coating that includes protective particles of a crystalline material that have a melting point above 1000° C. and is composed of one or more oxides in an amount of more than 95 wt. %. The coating covers more than 50% of the outer surfaces of more than 50% of the number of strands of the substrate.