Effect of porosity and temperature on the thermal conductivity of cermets

Correlation between Thermal and Electrical Properties of Spark Plasma Sintered (SPS) Porous Copper

“…For argon, the electrical conductivity, σ 2 , is negligible, while the thermal properties has to be discussed. According to [15], at normal conditions, heat convection through a porous metallic structure becomes of practical importance only at temperatures above 1000K and for pore diameter larger than 5000μm. It was also reported in [15] that heat transfer by radiation in the pores at moderate and high temperatures might be neglected.…”

“…According to [15], at normal conditions, heat convection through a porous metallic structure becomes of practical importance only at temperatures above 1000K and for pore diameter larger than 5000μm. It was also reported in [15] that heat transfer by radiation in the pores at moderate and high temperatures might be neglected. Thus, for materials with relatively small pores, as in our case, conductive heat transfer is the dominant process at the investigated temperature.…”