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Thermophysical Properties of Biporous Sintered Copper

[+] Author Affiliations
Ying-Yu Lin, Tadej Semenic, Ivan Catton

University of California at Los Angeles

Paper No. IMECE2005-82190, pp. 785-791; 7 pages
doi:10.1115/IMECE2005-82190
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4222-3 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Thermophysical properties of bidispersed (biporous)-sintered copper are measured. An apparatus to measure effective thermal conductivity of dry samples is built. It is calibrated using bulk samples with known thermal conductivity. Permeability is measured based on flow resistance though the porous samples. Velocity at different pressure drops is measured and the permeability calculated using Darcy’s law. The experiment is performed using silicone oil as working liquid. The error of the method is less than three percent. Capillary pressure for all samples is measured based on amount of liquid that is held by the porous sample. The Young-Laplace relationship is used to relate capillary pressure to effective pore radius. Porosity of the samples is measured using density method. According to the measurement results, effective thermal conductivity of biporous samples is much lower than for comparable monoporous samples. Permeability and porosity of biporous samples are much higher than the monoporous samples. Capillary pressure of the biporous samples is very close to the one measured for the monoporous samples.

Copyright © 2005 by ASME
Topics: Copper

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