This article presents experimental results of the thermal conductivity of sintered metal foams, which were manufactured by the Slip Reaction Foam Sintering (SRFS) process. For the determination of the thermal conductivity, the Transient Plane Source Technique, also known as Hot Disk, was employed. The thermal conductivity of cellular solids differs from that of their corresponding dense material. Therefore, the various pore size level effects contributing to the thermal conductivity are accounted for by introducing an effective thermal conductivity λeff. The thermal conductivity of the strut material, a sintered packed bed, was determined up to 700°C and compared to similar materials. The thermal diffusivity could also be determined by the Laser-Flash method and compared to the Hot Disk values. For the foams, λeff was determined for a total porosity of 0.85 up to 700°C. In this article, a dependency between the porosity and λeff can be shown. The linear rise of λeff up to 400°C can be due to the increase of the thermal conductivity of the solid phase. The measurements are validated by comparison of the received specific heat with values received by thermogravimetry measurements. The general applicability of the measurement method to heterogeneous materials such as metal foams is discussed and an outlook about further investigations is given.
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ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels
June 19–21, 2006
Limerick, Ireland
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4760-8
PROCEEDINGS PAPER
Temperature Dependency of the Effective Thermal Conductivity of Nickel Based Metal Foams Available to Purchase
Joerg Sauerhering,
Joerg Sauerhering
German Aerospace Center, Ko¨ln, Germany
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Oliver Reutter,
Oliver Reutter
German Aerospace Center, Ko¨ln, Germany
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Thomas Fend,
Thomas Fend
German Aerospace Center, Ko¨ln, Germany
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Stefanie Angel,
Stefanie Angel
Aachen University, Aachen, Germany
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Robert Pitz-Paal
Robert Pitz-Paal
German Aerospace Center, Ko¨ln, Germany
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Joerg Sauerhering
German Aerospace Center, Ko¨ln, Germany
Oliver Reutter
German Aerospace Center, Ko¨ln, Germany
Thomas Fend
German Aerospace Center, Ko¨ln, Germany
Stefanie Angel
Aachen University, Aachen, Germany
Robert Pitz-Paal
German Aerospace Center, Ko¨ln, Germany
Paper No:
ICNMM2006-96136, pp. 611-615; 5 pages
Published Online:
September 15, 2008
Citation
Sauerhering, J, Reutter, O, Fend, T, Angel, S, & Pitz-Paal, R. "Temperature Dependency of the Effective Thermal Conductivity of Nickel Based Metal Foams." Proceedings of the ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels, Parts A and B. Limerick, Ireland. June 19–21, 2006. pp. 611-615. ASME. https://doi.org/10.1115/ICNMM2006-96136
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