Influence of structure on the thermophysical characteristics of porous metals

An experimental investigation of the thermal conductivity and thermal diffusivity of porous copper and iron with different porous structures is made. A dependence of the thermophysical characteristics on the degree of porosity and the mean pore size is established. A correlation with the structural model made it possible to take into account the dependence of the pore size distribution on the parameters.Notation , _com thermal conductivity coefficients of porous and compact materials - ₁, ₂ thermal conductivity coefficients for the cases of isolated and intercommunicating pores - ₁ ^* , ₂ ^* thermal conductivity coefficients of monodisperse structures - a,a _com thermal diffusivity coefficients of porous and compact materials - C _p specific heat - density - P porosity - r, size and mean size of pores - r _str structural parameter - D variance of pore size - R size of an elementary cell - F(r, ,D) differential function of pore size distribution Altai State University, Barnaul. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 68, No. 5, pp. 720–723, September–October, 1995.