Nanostructured Composite Ceramic Materials in the ZrO2-Al2O3 System

摘要

The composite ceramic materials based alumina and zirconia in the monoclinic form(10 wt %)or the tetragonal form stabilized by yttrium(7-45 wt %)are produced from metastable nanopowders through magnetic pulsed compaction followed by free sintering.The specific features revealed in the shrinkage are investigated at temperatures in the range 1400-1500°C.The development of the microstructure and polymorphic transformations are analyzed using X-ray diffraction and atomic-force microscopy.The fracture toughness and the microhardness of the samples are determined by the indentation technique.