（1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; 2. Engi‐
neering Research Center of Powder Metallurgy of Anhui Province, Hefei 230009, China; 3. Copper Alloy and
Forming Engineering Research Center of Ministry of Education, Hefei 230009,
Abstract：Porous copper foams were prepared by loose sintering water-air combination atomization copper pow‐
der and electrolytic copper powder at 700~900 °C for 120 min, respectively. Influence of the raw copper powders
and the sintering temperature on the porosity, pore structure and properties of the sintered porous copper samples
were investigated. The results show that with the increase of sintering temperature, the porosity of sintering sam‐
ples decreases. The porosity of sintered samples prepared from water-air combination atomized copper powders is
about 30%-60%, with uniform morphology of pores, while the porosity of the sintered samples prepared from elec‐
trolytic copper powders is about 40%-70%, with irregular pore morphology. At the porosity of 50%, the initial
yield strength and thermal conductivity of the sintered porous copper samples prepared from the atomized copper
powder are 20.18 MPa and 59.13 W·m/K, respectively, while for the samples prepared from the electrolytic copper
powder are 14.44 MPa and 41.32 W·m/K respectively. The sintered copper foam prepared from the atomized pow‐
der own better mechanical and thermal properties with similar porosity, which can be ascribe to the pore formation
mechanism during the loose sintering process.
2024, Vol. 34 
