TY - JOUR
T1 - Unveiling empirical correlation between electrical and thermal conductivities of medium porosity open-cell porous aluminium fabricated by replication casting method
AU - Egwuonwu, Njoku Romanus
AU - Boniface, Oloche Oyihi
AU - Sunday, Aigbodion Victor
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.
PY - 2024
Y1 - 2024
N2 - In this work, the electrical and thermal conductivities of open-cell porous aluminium materials produced by replication casting method are investigated and the correlations between them studied. The four-point probe method was used to measure the electrical conductivity of the samples, while the C-therm analyser was used to experimentally determine the thermal conductivity of the cellular materials. The results show that both electrical and thermal conductivities of the porous samples increase as their relative density is increased. Comparison of the measured data with theoretical models shows that the scaling function with a dynamic exponent equal to 1.55 fits the experimental data for electrical conductivity. In addition, an empirical relationship was found to exist between measured electrical and thermal conductivities, while a modified Wiedemann-Franz law was also deduced to correlate the electrical and thermal conductivities of the porous aluminium materials.
AB - In this work, the electrical and thermal conductivities of open-cell porous aluminium materials produced by replication casting method are investigated and the correlations between them studied. The four-point probe method was used to measure the electrical conductivity of the samples, while the C-therm analyser was used to experimentally determine the thermal conductivity of the cellular materials. The results show that both electrical and thermal conductivities of the porous samples increase as their relative density is increased. Comparison of the measured data with theoretical models shows that the scaling function with a dynamic exponent equal to 1.55 fits the experimental data for electrical conductivity. In addition, an empirical relationship was found to exist between measured electrical and thermal conductivities, while a modified Wiedemann-Franz law was also deduced to correlate the electrical and thermal conductivities of the porous aluminium materials.
KW - Electrical conductivity
KW - Porous metal
KW - Relative density
KW - Replication casting
KW - Thermal conductivity
KW - Wiedemann-Franz law
UR - http://www.scopus.com/inward/record.url?scp=85185105716&partnerID=8YFLogxK
U2 - 10.1007/s00170-024-13230-6
DO - 10.1007/s00170-024-13230-6
M3 - Article
AN - SCOPUS:85185105716
SN - 0268-3768
JO - International Journal of Advanced Manufacturing Technology
JF - International Journal of Advanced Manufacturing Technology
ER -