Nano-structured Alumina-ZrO2 ceramic laminates

Resumo

In the last years many efforts have been expended to develop colloidal process that uses water instead of organic
solvents in the tape casting process. In present work, alumina/zirconia laminated nanocomposites were fabricated
by layer-by-layer method and using water-based tape casting process. Physical and mechanical properties as well
as the fracture mode were investigated. The laminates consisted of stacked alumina and zirconia green sheets
produced by thermopressing. The ceramic laminates were first heated at 450°C (organic elimination) and
subsequently sintered in air at 1500°C during 1 h. The ceramic laminates showed a mechanical strength of
approximately 103 MPa (AZAZA) and 44 MPa (ZAZAZ), respectively and an intergranular-transgranular mixed
fracture mode.
Keywords: nanocomposites, laminates, tape casting .