Fiber-Reinforced HTS Structures to Prevent Cracking During Calcination
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Solution Overview
Problem
High-temperature superconductors (HTS) are brittle, difficult to form into useful shapes, and their production process is complex, making them expensive and prone to cracking due to oxidation of reinforcing materials during high-temperature calcination, leading to limited practical applications.
Innovation Solution
Incorporating continuous, long fibers made of materials like SiC into the HTS composition to prevent contamination and cracking during sintering and crystallization, allowing for precise shaping and cost-effective production of HTS components through subtractive sculpting and continuous production methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing materials are added to HTS to relieve brittleness, then mechanical strength is improved, but oxidation of reinforcing materials during high-temperature calcination occurs which interferes with HTS production
Solution Approach 1:
A coating layer is applied to the reinforcing fibers to act as an intermediary barrier. This coating prevents direct oxidation of the reinforcing materials during high-temperature calcination while allowing the fibers to maintain their mechanical reinforcement function. The coating serves as a protective mediator between the reinforcing fibers and the oxidizing atmosphere.
Solution Approach 2:
The patent employs an inert or controlled atmosphere during the calcination process to prevent oxidation of reinforcing materials. By creating an oxygen-free or low-oxygen environment, the reinforcing fibers can be processed at high temperatures without oxidizing, thus maintaining both their structural integrity and reinforcement capability.
2Ease of manufacture
If discontinuous particles or chopped fibers are used as reinforcement, then manufacturing is simplified, but agglomeration during melt phase creates crack and fault planes reducing HTS strength
Solution Approach 1:
The reinforcing fibers are divided into discrete segments or chopped into specific length ranges that optimize both manufacturability and performance. This segmentation allows the fibers to be easily mixed with HTS precursors while preventing excessive agglomeration. The controlled segmentation ensures uniform distribution without creating large clumps that would disrupt crystal formation.
Solution Approach 2:
The patent optimizes specific parameters of the reinforcing fibers including length, diameter, aspect ratio, and surface characteristics to prevent agglomeration. By carefully controlling these parameters, the fibers maintain good dispersion during mixing and processing while still providing effective reinforcement. The optimized parameters ensure fibers do not clump together during the melt phase.
3Strength
If external reinforcement such as PIT wire production or encasing HTS in durable materials is used, then mechanical robustness is improved, but production becomes difficult and expensive for practical applications
Solution Approach 1:
The reinforcing fibers are integrated directly into the HTS bulk material during the formation process, merging the structural reinforcement function with the superconducting material itself. This combination eliminates the need for separate encasing or complex external reinforcement structures, simplifying both manufacturing and the final device architecture while maintaining mechanical robustness.
Solution Approach 2:
The patent creates a composite material where reinforcing fibers are embedded within the HTS matrix. This composite structure provides both the superconducting properties of HTS and the mechanical strength of the reinforcing fibers in a unified material system, avoiding the complexity of separate reinforcement components and their associated assembly processes.
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 use of continuous fibers strengthens HTS materials, enabling efficient and cost-effective manufacturing of a variety of components with controlled electric and magnetic fields, reducing brittleness and cracking, and facilitating widespread commercial applications.
Implementation Method 1
nearly all potential materials, which are stable across this process' high temperature such as metals, carbon, composites, ceramics, etc., oxidize during this process which interferes with the creation of the HTS material
Implementation Method 2
Incorporating continuous, long fibers made of materials like SiC into the HTS composition to prevent contamination and cracking during sintering and crystallization
Implementation Method 3
Superconductivity is the property of transmitting electricity with no or little resistance
Implementation Method 4
HTS can achieve superconductivity at temperatures as high as 138 K (−135° C.) and can be cooled using substances such as liquid nitrogen
Data Source
AI summary
A device comprises a tube with a tube HTS solenoid, wherein a projectile in a sabot comprising a sabot HTS solenoid. A method comprises disposing a seed HTS crystal on a growing crystal in contact with an a-b plane of the seed HTS crystal to grow the growing crystal, wherein the a-b plane is perpendicular to a c-axis. A method comprises disposing a seed HTS crystal on a growing crystal in contact with a b-c plane of the seed HTS crystal to grow the growing crystal, wherein the b-c plane is perpendicular to an a-axis. A device comprises a reinforced HTS material in a graphene casing, wherein the HTS in the graphene casing includes a cooling channel and a return channel.