Compressive deformation Behaviour of superplastic Y-TZP-Based ceramics: role of grain boundary phases

摘要

The compressive deformation behaviour of Y-TZP- based ceramics was investigated for its dependence on temperature, applied stress, grain size and the grain boundary phases of the materials. The defor- mation behaviour of the materials depends strongly on the grain boundary phase and the testing tem- perature. At 1250 deg.C and above, the presence of LAS glass at boundaries in Y-TZP leads to much Promoted deformation rates; while at temperatures Lower than 1250 deg.C, the LAS added composites Show apparent retarded deformation.