1993 Volume 101 Issue 1180 Pages 1415-1418
Thermal shock resistant zirconia ceramics reinforced with zirconia fibers have been developed. Zirconia ceramics with 12wt% fiber having an average length of 2.5 or 0.2mm and without fibers were studied. Sintered bodies with different bulk densities were obtained by firing in air at temperatures between 1250 and 1650°C. Dispersed ZrO2 fibers remarkably improved the thermal shock resistance of the ZrO2 ceramics. The bending strength and thermal shock resistance of the samples in which ZrO2 fibers were spheroidized by diffusion during sintering decreased, even though they had high densities. The bending strength did not change after water quenching from 625 to 25°C for the zirconia ceramics reinforced with long fibers.
