抄録
The mechanical and thermal properties of porous ceramics with the controlled pore design were investigated by experimental and numerical analysis. Porous alumina ceramics containing well-defined pore shape, size and distribution were prepared by incorporation of various shapes of fugitive additives (plate-like graphite, chopped carbon fiber, spherical polymer) into alumina. Processing variables provide the number of variety of microstructure, the amount of porosity, the degree of alignments of anisotropic porosity and the gradient of porosity as well. Young′s modulus and thermal conductivity were evaluated by resonant frequency method and laser flash method, respectively. Elasticity changes with different pore structure were calculated by using finite element analysis(FEA) and compared with the experimental data. Finite element analysis was confirmed as a useful tool to simulate the effect of pore structure on the mechanical and thermal properties of porous ceramics. The design parameter of pore structure of porous ceramics will be discussed.
