Thermal Expansion of Composite Ceramic of the Zirconium Dioxide – Aluminum Oxide System

Resumo

The change in LTEC is analyzed on heating and cooling ceramic materials of the Al₂O₃–ZrO₂ system in the range 200 – 1500°C. The effect of structural and phase components and measurement regime (heating/cooling) on form of the relationship Δl/l₀ = f(t), and also the dependence of LTEC on composite chemical composition are established. Results obtained are discussed from the point of view of material phase composition and published data are analyzed. Data are provided for average and true LTEC values.