Superconducting Properties of Titanium Alloys (Ti-64 and Ti-6242) for Critical Current Barrels

Ridgeon, Francis J.; Raine, Mark J.; Halliday, D.P.; Lakrimi, M.; Thomas, Adrian; Hampshire, D.P.

doi:10.1109/tasc.2016.2645378

Cited by 6 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through previous DC resistance measurements, it is known that Ti-6Al-4V is a superconductor with a single transition temperatures that varies in the range of 1.3 K to 6.3 K depending on oxidation treatment as well as post processing annealing [13][14][15][16][17][18][19]. In agreement with this literature, we observe a superconducting transition temperature of 4.5 K ( Fig.…”

supporting

confidence: 89%

High-kinetic inductance additive manufactured superconducting microwave cavity

Holland

Rosen

Materise

et al. 2017

Applied Physics Letters

View full text Add to dashboard Cite

Investigations into the microwave surface impedance of superconducting resonators have led to the development of single photon counters that rely on kinetic inductance for their operation. While concurrent progress in additive manufacturing, '3D printing', opens up a previously inaccessible design space for waveguide resonators. In this manuscript, we present results from the first synthesis of these two technologies in a titanium, aluminum, vanadium (Ti-6Al-4V) superconducting radio frequency resonator which exploits a design unattainable through conventional fabrication means. We find that Ti-6Al-4V has two distinct superconducting transition temperatures observable in heat capacity measurements. The higher transition temperature is in agreement with DC resistance measurements. While the lower transition temperature, not previously known in literature, is consistent with the observed temperature dependence of the superconducting microwave surface impedance. From the surface reactance, we extract a London penetration depth of 8 ± 3µm -roughly an order of magnitude larger than other titanium alloys and several orders of magnitude larger than other conventional elemental superconductors. This large London penetration depth suggests that Ti-6Al-4V may be a suitable material for high kinetic inductance applications such as single photon counting or parametric amplification used in quantum computing.

show abstract

supporting

confidence: 89%

High-kinetic inductance additive manufactured superconducting microwave cavity

Holland

Rosen

Materise

et al. 2017

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…23. As Ti 6Al-4V alloy turns superconducting 25 below ≈ 5 K and as a consequence, its thermal conductivity becomes significantly reduced, the sample inside the cell cannot be cooled below 5 K. Therefore, the use of this particular cell is restricted to temperatures above 5 K. This issue can be circumvented by using cells made out of a different material, such as CuBe/Ni-Cr-Al.…”

Section: Methodsmentioning

confidence: 99%

Use of Cernox thermometers in AC specific heat measurements under pressure

Gati

Drachuck

et al. 2019

Review of Scientific Instruments

View full text Add to dashboard Cite

We report on the resistance behavior of bare-chip Cernox thermometers under pressures up to 2 GPa, generated in a piston-cylinder pressure cell. Our results clearly show that Cernox thermometers, frequently used in low-temperature experiments due to their high sensitivity, remain highly sensitive even under applied pressure. We show that these thermometers are therefore ideally suited for measurements of heat capacity under pressure utilizing an ac oscillation technique up to at least 150 K. Our Cernox-based system is very accurate in determining changes of the specific heat as a function of pressure as demonstrated by measurements of the heat capacity on three different test cases: (i) the superconducting transition in elemental Pb (T c = 7.2 K), (ii) the antiferromagnetic transition in the rare-earth compound GdNiGe 3 (T N = 26 K) and (iii) the structural/magnetic transition in the ironpnictide BaFe 2 As 2 (T s,N = 130 K). The chosen examples demonstrate the versatility of our technique for measuring the specific heat under pressure of various condensedmatter systems with very different transition temperatures as well as amounts of removed entropy. 1 arXiv:1901.05089v2 [cond-mat.mtrl-sci]

show abstract

“…Figure 6 and Figure 7). Although Ti-64 alloy is widely used, at 4.2 K and below 3 T it becomes superconducting and Ti-6Al-2Sn-4Zr-2Mo-0.2Si (Ti-6242) can be a better choice [48]. Cu-Be is also often used as a sample holder because one can easily solder the sample to it, minimising sample movement, and because of its high elastic limit [47].…”

Section: G2327 Sample Holder -Bonding Thermal Contraction and Resisti...mentioning

confidence: 99%

“…Cu-Be is also often used as a sample holder because one can easily solder the sample to it, minimising sample movement, and because of its high elastic limit [47]. However, at 10 K the resistivities of the Ti-alloys are about 1.5 × 10 −6 Ω m whereas Cu-Be is much less resistive at 4.7 × 10 −8 Ω m, so one has to be careful about current shunting through the sample holder as the superconductor becomes resistive at 𝐼 " [48]. As discussed below, although the shunting might only produce a small error for correction for 𝐼 " , it can significantly affect the measured n-value.…”

Section: G2327 Sample Holder -Bonding Thermal Contraction and Resisti...mentioning

confidence: 99%