Ceramic Fiber Composite Laser Safety Wall
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Solution Overview
Problem
Conventional metallic laser protection walls have limited effectiveness due to melting under high energy input, leading to short service life and impractical thickness due to weight, and are not cost-effective with high melting point metals.
Innovation Solution
A laser protective wall made of ceramic fiber composite materials, such as carbon fiber-reinforced carbon with silicon carbide (C/C-SiC), which absorbs energy without melting and maintains structural integrity at high temperatures, utilizing the LSI process for production with variable geometries and enhanced thermal conductivity from pitch fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic laser protection walls are used, then they can reflect and absorb laser energy, but they melt under high energy input leading to short service life
Solution Approach 1:
The patent changes the material parameter from metallic to ceramic fiber composite, which has fundamentally different thermal properties. The ceramic material maintains structural stability at temperatures where metals would melt, thereby extending service life while maintaining protective reliability under high energy laser input.
Solution Approach 2:
The patent employs composite materials consisting of ceramic fibers embedded in a ceramic matrix. This composite structure combines the high temperature resistance of ceramic fibers with the structural integrity of the matrix, creating a material that can withstand prolonged laser energy exposure without melting, thus resolving the contradiction between protective effect and service life.
2Duration of action of stationary object
If thicker metallic walls are used to extend service life, then protection duration increases, but weight becomes impractically high
Solution Approach 1:
The patent changes the material density parameter by switching from dense metallic materials to porous ceramic fiber composites. This material substitution provides superior high-temperature resistance per unit weight, allowing the wall to achieve extended service life without requiring impractical thickness increases, thereby maintaining acceptable weight levels.
Solution Approach 2:
The ceramic fiber composite structure inherently provides high strength-to-weight ratio and exceptional thermal resistance. The fibrous composite architecture allows the material to withstand thermal stresses and maintain structural integrity at high temperatures with much lower density than metals, resolving the weight versus service life contradiction.
3Duration of action of stationary object
If ceramic fiber composite materials are used, then thermal shock resistance and service life are improved, but material availability and manufacturing experience are limited
Solution Approach 1:
The patent addresses the manufacturing challenge by establishing a systematic production approach using established ceramic fiber processing techniques. The method involves preparing ceramic fiber precursors, forming the composite structure, and applying appropriate surface treatments or coatings to optimize laser interaction. This preliminary structuring of the manufacturing process makes the technology transferable despite limited prior experience.
Solution Approach 2:
The patent modifies material parameters to achieve desired performance characteristics through controlled processing. By adjusting fiber composition, matrix material selection, and processing temperature parameters, the manufacturing process can be optimized for different laser protection requirements, making the technology adaptable and manufacturable with existing ceramic processing capabilities.
Data Source
Figure 1
AI summary
In order to create a laser safety wall (40) as protection against the emission of laser radiation (30) from a laser technical system (10) which has an improved protective effect, it is proposed that the laser safety wall be made of a ceramic fiber composite material.