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Thermographic observation of heat transport in solid foams

: Netzelmann, U.; Abuhamad, M.; Walle, G.


Journal de physique. 4, Colloque 125 (2005), S.511-513
ISSN: 1155-4339
International Conference on Photoacoustic and Photothermal Phenomena (ICPPP) <13, 2004, Rio de Janeiro>
Zeitschriftenaufsatz, Konferenzbeitrag
Fraunhofer IZFP ()

Heat transport in solid foams was studied by flash lamp heated dynamic thermography. For polyurethane foams, a movement of the peak temperature from the heated surface into the depth could be observed. This could be modelled by assuming a Beer optical absorber with non-adiabatic boundary. For large open pores, individual temperature-time curves were observed in the thermographic image. There is evidence for non-conductive heat transfer in the bulk of mixed-cell foams. In SiSiC ceramic foams, indications for sub-surface defects were detected.