Characterization of Thermal Stability of Al2TiO5-Based Functional Graded Ceramics

This research paper focused on the diffraction study of thermal stability in functionally-graded aluminium titanate Al2TiO5- based functional graded ceramic composites.The main aims of the research were to study the parameters that control the thermal stability of Al2TiO5- based functional graded ceramics and to evaluate the effect of atmospheres, in the range of 20- 1400°C. A high-temperature vacuum annealing process was proposed for the design of functionally graded Al2TiO5- ceramics. The effect of the atmospheres (air, argon and 50 % oxygen, 50% argon) on the isothermal stability of Al2TiO5 at 1100˚C and its decomposition behavior in the temperature range of 20–1400˚C were characterized by ND. There was no decomposition of Al2TiO5 in air and argon, as well as oxygen partial pressure of up to 1100°C, but it occurred between 1150 and 1300°C