Formation of 3D tubular cannel in fully densified zirconia ceramics by free-foaming method using superplasticity

Three-dimensional (3D) tubular cannels in fully densified zirconia ceramics have been fabricated by a newly developed solid-state free-foaming method using superplasticity. Three mole percent of yttria-stabilised zirconia (3YSZ) and α-SiC were used as foam matrix and foaming agent simultaneously. Dried pattern of 15 wt% (wt%) α-SiC slurry based on 10 wt% methyl cellulose buried into 3YSZ powder compacts and proper heat treatment at the sintering temperature causes successful fabrication of 3D cannel in zirconia ceramics.