The thermal conductance of indium-filled contacts at cryogenic temperatures

Patrick Phelan, Meng Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Indium foil is often used to increase the thermal contact conductance h c of junctions at cryogenic temperatures, yet relatively few experimental data on h c at subambient temperatures are available. Here, experimental measurements of h c at a copper/copper junction containing a 25.4-μm-thick indium foil are reported. The average sample temperature ranged from 40 to 180 K, and the contact pressures ranged from 0.2 to 20 MPa. Although it was originally anticipated that increasing the contact pressure would lead to increasing h c, the observed h c showed little or no dependence on contact pressure. This was attributed to the severe nonflatness of the copper surfaces. Comparison between the measured h c, and that calculated from existing "flat" and "nonflat" theories indicated better agreement with the "nonflat" model, although the model still predicted that h c should depend on pressure.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages753-758
Number of pages6
Volume375
Edition2
DOIs
StatePublished - 2004
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

Other

Other2004 ASME International Mechanical Engineering Congress and Exposition, IMECE
CountryUnited States
CityAnaheim, CA
Period11/13/0411/19/04

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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  • Cite this

    Phelan, P., & Zhang, M. (2004). The thermal conductance of indium-filled contacts at cryogenic temperatures. In American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD (2 ed., Vol. 375, pp. 753-758). [IMECE2004-61971] American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2004-61971