Phase transformations at the heat treatment of disperse powder in the ZrO₂—Y₂O₃—CeO₂—Al₂O₃—CoO system

Abstract

The variating of the physico-chemical properties of fine-grained powder based on ZrO₂ in the ZrO₂—Y₂O₃—CeO₂—Al₂O₃—СоО system, produced by the combined method of hydrothermal synthesis / mechanical mixing with heat treatment in the range from 400 to1300 °C was investigated. It was found that the formation of CoAl₂O₄ was accompanied by a reversible phase transformation of T-ZrO₂ → M-ZrO₂. The powder is characterized by high activity to sintering. The research results will be used for microstructural designing of blue composites based on ZrO₂.