The electrical resistance and thermal conductivity of Ti 15V-3Cr-3Sn-3Al at cryogenic temperatures

Patrick Wikus*, Scott A. Hertel, Steven W. Leman, Kevin A. McCarthy, Steven M. Ojeda, Enectalí Figueroa-Feliciano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Ti 15V-3Cr-3Sn-3Al, sometimes referred to as Ti 15-3-3-3 or "Magic Titanium", is a candidate material for components requiring high mechanical strength and low thermal conductivity at cryogenic temperatures. The electrical resistance of Ti 15-3-3-3 was measured between 230 mK and room temperature, and the thermal conductivity between 230 mK and 7.7 K. A superconducting transition was observed at TC = 3.89 ± 0.01 K. Below the superconducting transition temperature, the thermal conductivity was fitted to a function of the form λ(T<TC)=α·T·e-β·TC/T, where α = 0.043 ± 0.002 W/(m K2) and β = 0.27 ± 0.01. Above TC, the thermal conductivity of Ti 15-3-3-3 was fitted to a function of the form λ(T > TC) = γ · T δ, where γ=α·TC1-δ·e-β and δ = 0.4 ± 0.05. The thermal conductivity of Ti 15-3-3-3 is compared with other materials commonly used for the construction of thermally isolating support structures. Ti 15-3-3-3 is shown to exhibit one of the lowest ratios of thermal conductivity to mechanical strength and is thus particularly well suited for such applications.

Original languageEnglish (US)
Pages (from-to)41-44
Number of pages4
JournalCryogenics
Volume51
Issue number1
DOIs
StatePublished - Jan 1 2011

Keywords

  • A. Metals
  • A. Superconductors
  • C. Critical temperature
  • C. Electrical conductivity
  • C. Thermal conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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