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How will the effect of ultra-high pressure on the superconducting transition temperature of niobium-titanium alloy change the capillary performance?

The effect of ultra-high pressure on the superconducting transition temperature of niobium-titanium alloy significantly improves its superconducting performance. The potential changes to the capillary performance are reflected in the following aspects:

1. Improvement of superconducting transition temperature (Tc)
Research shows that the superconducting transition temperature of niobium-titanium alloy at normal pressure is about 9.6K, while under ultra-high pressure (up to 261.7GPa), Tc is increased to 19.1K, almost doubling. This means that niobium-titanium alloy can still maintain a superconducting state in a higher temperature range. For capillary applications that require low-temperature superconducting performance, the operating temperature range is expanded, improving the applicability and flexibility of the material.

2. Enhanced critical magnetic field
Under high pressure conditions, the critical magnetic field of niobium-titanium alloy is also increased from 15.4T to 19T, which enhances its superconducting stability in a strong magnetic field environment12. For the application of capillaries in strong magnetic field environments (such as nuclear magnetic resonance equipment or large scientific devices), this performance improvement helps maintain the superconducting state and reduce the impact of energy loss and magnetic flux fluctuations on the capillary structure.

3. Structural stability and volume compression
Under high pressure, the volume of niobium-titanium alloy is compressed by about 43%, but the crystal structure does not change, showing extremely strong structural stability14. This stability ensures that the capillary will not suffer performance degradation or mechanical failure due to structural phase change in high-pressure environments, and enhances the durability and reliability of the capillary.

4. Comprehensive impact on capillary performance
• The improvement of superconducting performance enables the capillary to still perform superconducting functions at higher temperatures and stronger magnetic fields, which is suitable for high-end cryogenic fluid transportation and magnetic field environments.
• Structural and mechanical stability ensure that the capillary maintains shape and size stability under extreme pressure to prevent deformation or rupture.
• The volume compression effect may affect the inner diameter and fluid dynamics of the capillary, which needs to be considered and compensated in the design.
In summary, ultra-high pressure increases the superconducting transition temperature and critical magnetic field of niobium-titanium alloy while maintaining its structural stability.
These changes help enhance the superconducting properties and mechanical reliability of the capillary in extreme environments, thereby expanding its application potential under low temperature, high pressure and strong magnetic field conditions.