Masataka Hakamada, Tatsuho Nomura, Youqing Chen, Hiromu Kusuda, and Mamoru Mabuchi
Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Sakyo, Kyoto 606-8501, Japan
Yasuo Yamada, Yasumasa Chino, Hiroyuki Hosokawa, and Takeshi Nakajima
Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Moriyama, Nagoya 463-8560, Japan
Compressive properties at 573-773 K of porous aluminum produced by the spacer method were investigated and compared with those in bulk reference aluminum with the same chemical compositions. The stress exponent and activation energy for deformation at elevated temperatures in the porous aluminum were in agreement with those in the bulk reference aluminum. In addition, the plateau stress of the porous aluminum was comparable to the stress of the bulk reference aluminum upon compensation by the relative density. Therefore, it is conclusively demonstrated that the mechanism of deformation at elevated temperatures in the porous aluminum is the same as that in the bulk reference aluminum. This is likely due to the homogeneous microstructure in the porous aluminum produced by the spacer method.