Ta-3W Alloy Stabilizing Elements in Superconducting Wires
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Solution Overview
Problem
Metallic superconducting wires often exhibit insufficient mechanical strength due to the ductile nature of the copper matrix, which compromises their stability during high-field and high-current applications.
Innovation Solution
Incorporating Ta-3W alloy as a stabilizing element within the copper-based wire matrix, which provides superior mechanical properties without significantly impacting the wire's conductivity, allowing for improved drawability and reduced occupancy of the wire's cross-section, thereby enhancing mechanical strength and current-carrying capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If copper matrix is used to facilitate drawability into wire, then ease of manufacture is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent applies composite materials by combining copper matrix with a stabilizing element core (such as tungsten or tungsten alloy) to create a composite wire structure. The copper provides ductility and ease of drawing, while the stabilizing element core provides mechanical strength. This composite structure resolves the contradiction by allowing the wire to be easily manufactured through drawing while simultaneously achieving the required mechanical strength for high-field and high-current applications.
2Reliability
If stabilizing element is added to improve mechanical strength, then reliability is improved, but cross-section occupancy increases
Solution Approach 1:
The patent applies parameter changes by selecting stabilizing elements with specific properties (high strength-to-area ratio) and optimizing their dimensions. By using elements like tungsten or tungsten alloys with exceptional mechanical properties, the patent achieves the required reliability and mechanical stability while minimizing the cross-sectional area occupied by the stabilizing element, thus maintaining high current-carrying capacity.
3Ease of operation
If ductile copper matrix is used for stability, then ease of operation is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the wire into two functional components: a ductile copper matrix that provides ease of operation and deformability, and a separate stabilizing element core that provides mechanical strength. This segmentation allows each component to perform its specialized function without compromising the other, resolving the contradiction between ductility and mechanical strength.
Data Source
Figure 1A~2D
Figure 3A~4E
Figure 5A~5E
AI summary
In various embodiments, superconducting wires feature assemblies of clad composite filaments and/or stabilized composite filaments embedded within a wire matrix. The wires may include one or more stabilizing elements for improved mechanical properties.