TY - JOUR
T1 - The electrical resistance and thermal conductivity of Ti 15V-3Cr-3Sn-3Al at cryogenic temperatures
AU - Wikus, Patrick
AU - Hertel, Scott A.
AU - Leman, Steven W.
AU - McCarthy, Kevin A.
AU - Ojeda, Steven M.
AU - Figueroa-Feliciano, Enectalí
PY - 2011/1/1
Y1 - 2011/1/1
N2 - 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.
AB - 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.
KW - A. Metals
KW - A. Superconductors
KW - C. Critical temperature
KW - C. Electrical conductivity
KW - C. Thermal conductivity
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U2 - 10.1016/j.cryogenics.2010.10.010
DO - 10.1016/j.cryogenics.2010.10.010
M3 - Article
AN - SCOPUS:78650629610
VL - 51
SP - 41
EP - 44
JO - Cryogenics
JF - Cryogenics
SN - 0011-2275
IS - 1
ER -